{"id":370,"date":"2025-04-15T09:10:27","date_gmt":"2025-04-15T09:10:27","guid":{"rendered":"https:\/\/www.coefficientfriction.com\/?page_id=370"},"modified":"2025-04-16T01:45:55","modified_gmt":"2025-04-16T01:45:55","slug":"astm-d4917","status":"publish","type":"page","link":"https:\/\/www.coefficientfriction.com\/vi\/astm-d4917","title":{"rendered":"ASTM D4917"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"370\" class=\"elementor elementor-370\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e87c6b2 e-flex e-con-boxed e-con e-parent\" data-id=\"e87c6b2\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-d087c52 e-con-full e-flex e-con e-child\" data-id=\"d087c52\" data-element_type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d9f31fd elementor-invisible elementor-widget elementor-widget-image\" data-id=\"d9f31fd\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"200\" src=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/04\/ASTM-D4197.webp\" class=\"attachment-large size-large wp-image-372\" alt=\"ASTM D4197\" srcset=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/04\/ASTM-D4197.webp 600w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/04\/ASTM-D4197-300x100.webp 300w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/04\/ASTM-D4197-18x6.webp 18w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-60fbb6b e-con-full e-flex e-con e-child\" data-id=\"60fbb6b\" data-element_type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0e3633c elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"0e3633c\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m h\u1ec7 s\u1ed1 ma s\u00e1t t\u0129nh v\u00e0 ma s\u00e1t \u0111\u1ed9ng theo ph\u01b0\u01a1ng ph\u00e1p m\u1eb7t ph\u1eb3ng ngang<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a73bac6 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"a73bac6\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"499\" data-end=\"1017\">Vi\u1ec7c hi\u1ec3u r\u00f5 \u0111\u1eb7c t\u00ednh ma s\u00e1t c\u1ee7a gi\u1ea5y l\u00e0 \u0111i\u1ec1u thi\u1ebft y\u1ebfu \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u trong c\u00e1c quy tr\u00ecnh in \u1ea5n, gia c\u00f4ng v\u00e0 \u0111\u00f3ng g\u00f3i. <strong data-start=\"643\" data-end=\"657\">ASTM D4917<\/strong> tr\u00ecnh b\u00e0y quy tr\u00ecnh ti\u00eau chu\u1ea9n \u0111\u1ec3 \u0111o l\u01b0\u1eddng <em data-start=\"710\" data-end=\"754\">h\u1ec7 s\u1ed1 ma s\u00e1t t\u0129nh v\u00e0 ma s\u00e1t \u0111\u1ed9ng<\/em> c\u1ee7a gi\u1ea5y in v\u00e0 gi\u1ea5y vi\u1ebft kh\u00f4ng tr\u00e1ng ph\u1ee7, gi\u00fap c\u00e1c chuy\u00ean gia ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng x\u00e1c \u0111\u1ecbnh c\u00e1ch th\u1ee9c gi\u1ea5y t\u01b0\u01a1ng t\u00e1c v\u1edbi ch\u00ednh n\u00f3 ho\u1eb7c v\u1edbi c\u00e1c v\u1eadt li\u1ec7u kh\u00e1c khi \u0111ang chuy\u1ec3n \u0111\u1ed9ng.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0364755 e-flex e-con-boxed e-con e-parent\" data-id=\"0364755\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f673fbc elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"f673fbc\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">ASTM D4917: Th\u1eed nghi\u1ec7m h\u1ec7 s\u1ed1 ma s\u00e1t c\u1ee7a gi\u1ea5y<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-156f03e elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"156f03e\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"1079\" data-end=\"1532\">Ti\u00eau chu\u1ea9n ASTM D4917 quy \u0111\u1ecbnh m\u1ed9t <strong data-start=\"1101\" data-end=\"1128\">ph\u01b0\u01a1ng ph\u00e1p m\u1eb7t ph\u1eb3ng ngang<\/strong> \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 ma s\u00e1t tr\u01b0\u1ee3t c\u1ee7a gi\u1ea5y, \u0111\u1eb7c bi\u1ec7t l\u00e0 <strong data-start=\"1187\" data-end=\"1206\">gi\u1ea5y kh\u00f4ng tr\u00e1ng<\/strong>, trong \u0111i\u1ec1u ki\u1ec7n s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf. Th\u1eed nghi\u1ec7m n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 m\u00f4 ph\u1ecfng c\u00e1c l\u1ef1c t\u00e1c \u0111\u1ed9ng l\u00ean c\u00e1c t\u1edd gi\u1ea5y trong c\u00e1c quy tr\u00ecnh nh\u01b0 <strong data-start=\"1324\" data-end=\"1373\">in \u1ea5n, n\u1ea1p gi\u1ea5y v\u00e0o m\u00e1y photocopy v\u00e0 \u0111\u00f3ng g\u00f3i<\/strong>. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o t\u00ednh nh\u1ea5t qu\u00e1n <strong data-start=\"1397\" data-end=\"1427\">t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c t\u1ea5m<\/strong>, gi\u00fap c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t duy tr\u00ec <strong data-start=\"1460\" data-end=\"1504\">t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a s\u1ea3n ph\u1ea9m, kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi m\u00e1y m\u00f3c<\/strong>, v\u00e0 s\u1ef1 h\u00e0i l\u00f2ng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i.<\/p><p class=\"\" data-start=\"1534\" data-end=\"1860\">C\u00e1c \u0111\u1eb7c t\u00ednh ma s\u00e1t \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 d\u1ec5 d\u00e0ng khi c\u00e1c t\u1edd gi\u1ea5y \u0111\u01b0\u1ee3c n\u1ea1p qua thi\u1ebft b\u1ecb. H\u1ec7 s\u1ed1 ma s\u00e1t (COF) qu\u00e1 th\u1ea5p c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng n\u1ea1p k\u00e9p, trong khi COF qu\u00e1 cao c\u00f3 th\u1ec3 g\u00e2y ra k\u1eb9t gi\u1ea5y ho\u1eb7c n\u1ea1p sai. Ti\u00eau chu\u1ea9n ASTM D4917 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u1ea3 hai v\u1ea5n \u0111\u1ec1 n\u00e0y <strong data-start=\"1737\" data-end=\"1771\">Th\u1eed nghi\u1ec7m ma s\u00e1t \u0111\u1ed9ng tr\u00ean gi\u1ea5y<\/strong> v\u00e0 <strong data-start=\"1776\" data-end=\"1809\">Th\u1eed nghi\u1ec7m ma s\u00e1t t\u0129nh tr\u00ean gi\u1ea5y<\/strong> k\u00e8m theo c\u00e1c quy tr\u00ecnh th\u1ef1c ti\u1ec5n v\u00e0 h\u01b0\u1edbng d\u1eabn chi ti\u1ebft.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-38e9bd9 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"38e9bd9\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Quy tr\u00ecnh th\u1eed nghi\u1ec7m h\u1ec7 s\u1ed1 ma s\u00e1t theo ti\u00eau chu\u1ea9n ASTM D4917<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b4a43e8 e-con-full e-flex e-con e-child\" data-id=\"b4a43e8\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-949eee6 elementor-widget__width-inherit elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"949eee6\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInLeft&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"1914\" data-end=\"2019\">\u0110\u1ec3 ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m ma s\u00e1t theo ti\u00eau chu\u1ea9n ASTM D4917, c\u00e1c m\u1eabu th\u1eed ph\u1ea3i <strong data-start=\"1983\" data-end=\"2003\">c\u1eaft v\u00e0 s\u01a1 ch\u1ebf<\/strong> m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c:<\/p><ul><li data-start=\"2023\" data-end=\"2149\">\u0110\u1ed1i v\u1edbi <strong data-start=\"2027\" data-end=\"2052\">H\u1ec7 s\u1ed1 ma s\u00e1t (COF) theo h\u01b0\u1edbng m\u00e1y<\/strong>, c\u00e1c m\u1eabu \u0111\u01b0\u1ee3c c\u1eaft sao cho h\u01b0\u1edbng th\u1edb g\u1ed7 song song v\u1edbi chi\u1ec1u d\u00e0i (215 mm \u00d7 130 mm).<\/li><li data-start=\"2023\" data-end=\"2149\">\u0110\u1ed1i v\u1edbi <strong data-start=\"2156\" data-end=\"2187\">H\u1ec7 s\u1ed1 ma s\u00e1t (COF) theo h\u01b0\u1edbng ngang m\u00e1y<\/strong>, v\u00e2n g\u1ed7 ch\u1ea1y d\u1ecdc theo c\u1ea1nh ng\u1eafn h\u01a1n.<\/li><li data-start=\"2023\" data-end=\"2149\">Vi\u1ec7c x\u1eed l\u00fd tr\u01b0\u1edbc v\u00e0 th\u1eed nghi\u1ec7m ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong m\u00f4i tr\u01b0\u1eddng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t, theo quy \u0111\u1ecbnh t\u1ea1i ti\u00eau chu\u1ea9n ASTM D685.<\/li><\/ul><p class=\"\" data-start=\"2327\" data-end=\"2654\">C\u00e1c m\u1eabu v\u1eadt \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp th\u00e0nh t\u1eebng c\u1eb7p \u2014 m\u1ed9t m\u1eabu \u0111\u01b0\u1ee3c \u0111\u1eb7t tr\u00ean m\u1ed9t b\u1ec1 m\u1eb7t n\u1eb1m ngang v\u00e0 m\u1eabu c\u00f2n l\u1ea1i \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o m\u1ed9t <strong data-start=\"2423\" data-end=\"2431\">xe tr\u01b0\u1ee3t tuy\u1ebft<\/strong>\u2014v\u00e0 \u0111\u01b0\u1ee3c ki\u1ec3m tra b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u1ed9t <strong data-start=\"2451\" data-end=\"2489\">thi\u1ebft b\u1ecb \u0111o t\u1ed1c \u0111\u1ed9 chuy\u1ec3n \u0111\u1ed9ng kh\u00f4ng \u0111\u1ed5i<\/strong>. C\u00e1i <strong data-start=\"2495\" data-end=\"2509\">COF t\u0129nh<\/strong> \u0111\u01b0\u1ee3c ghi nh\u1eadn l\u00e0 l\u1ef1c c\u1ea7n thi\u1ebft \u0111\u1ec3 kh\u1edfi \u0111\u1ed9ng chuy\u1ec3n \u0111\u1ed9ng, v\u00e0 <strong data-start=\"2572\" data-end=\"2587\">H\u1ec7 s\u1ed1 ma s\u00e1t \u0111\u1ed9ng h\u1ecdc (COF)<\/strong> l\u00e0 l\u1ef1c trung b\u00ecnh trong qu\u00e1 tr\u00ecnh tr\u01b0\u1ee3t \u1ed5n \u0111\u1ecbnh tr\u00ean qu\u00e3ng \u0111\u01b0\u1eddng 130 mm.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-768d61b e-con-full e-flex e-con e-child\" data-id=\"768d61b\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e43e1f1 elementor-widget__width-inherit elementor-invisible elementor-widget elementor-widget-video\" data-id=\"e43e1f1\" data-element_type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/youtu.be\\\/NUgXENOz8J0&quot;,&quot;autoplay&quot;:&quot;yes&quot;,&quot;play_on_mobile&quot;:&quot;yes&quot;,&quot;mute&quot;:&quot;yes&quot;,&quot;loop&quot;:&quot;yes&quot;,&quot;_animation&quot;:&quot;fadeInRight&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f5aa253 elementor-invisible elementor-widget elementor-widget-image\" data-id=\"f5aa253\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInRight&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.coefficientfriction.com\/vi\/\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"600\" height=\"200\" src=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/ASTM-D1894-1.webp\" class=\"attachment-large size-large wp-image-77\" alt=\"ASTM D1894\" srcset=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/ASTM-D1894-1.webp 600w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/ASTM-D1894-1-300x100.webp 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9d958da e-flex e-con-boxed e-con e-parent\" data-id=\"9d958da\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5055911 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"5055911\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Ph\u01b0\u01a1ng ph\u00e1p th\u1eed h\u1ec7 s\u1ed1 ma s\u00e1t tr\u00ean gi\u1ea5y - T\u00ednh to\u00e1n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7cac45b elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"7cac45b\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"2720\" data-end=\"2784\">Ti\u00eau chu\u1ea9n ASTM D4917 quy \u0111\u1ecbnh c\u00e1c c\u00f4ng th\u1ee9c \u0111\u01a1n gi\u1ea3n \u0111\u1ec3 t\u00ednh to\u00e1n c\u00e1c gi\u00e1 tr\u1ecb h\u1ec7 s\u1ed1 ma s\u00e1t (COF):<\/p><ul data-start=\"2786\" data-end=\"2915\"><li class=\"\" data-start=\"2786\" data-end=\"2852\"><p class=\"\" data-start=\"2788\" data-end=\"2852\"><strong data-start=\"2788\" data-end=\"2807\">H\u1ec7 s\u1ed1 ma s\u00e1t t\u0129nh (Us)<\/strong> = L\u1ef1c c\u1ea7n thi\u1ebft \u0111\u1ec3 b\u1eaft \u0111\u1ea7u chuy\u1ec3n \u0111\u1ed9ng \/ Tr\u1ecdng l\u01b0\u1ee3ng xe tr\u01b0\u1ee3t<\/p><\/li><li class=\"\" data-start=\"2853\" data-end=\"2915\"><p class=\"\" data-start=\"2855\" data-end=\"2915\"><strong data-start=\"2855\" data-end=\"2875\">H\u1ec7 s\u1ed1 ma s\u00e1t \u0111\u1ed9ng h\u1ecdc (Anh)<\/strong> = L\u1ef1c tr\u01b0\u1ee3t trung b\u00ecnh \/ Tr\u1ecdng l\u01b0\u1ee3ng xe tr\u01b0\u1ee3t<\/p><\/li><\/ul><p class=\"\" data-start=\"2917\" data-end=\"3149\">M\u1ed7i k\u1ebft qu\u1ea3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00ednh trung b\u00ecnh d\u1ef1a tr\u00ean n\u0103m c\u1eb7p m\u1eabu h\u1ee3p l\u1ec7 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u00fd ngh\u0129a th\u1ed1ng k\u00ea. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u1ea3m b\u1ea3o <strong data-start=\"3031\" data-end=\"3065\">kh\u1ea3 n\u0103ng l\u1eb7p l\u1ea1i v\u00e0 kh\u1ea3 n\u0103ng truy xu\u1ea5t ngu\u1ed3n g\u1ed1c<\/strong>, ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh v\u1ec1 <strong data-start=\"3104\" data-end=\"3125\">\u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng<\/strong> trong ng\u00e0nh s\u1ea3n xu\u1ea5t gi\u1ea5y.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f7a7ced e-flex e-con-boxed e-con e-parent\" data-id=\"f7a7ced\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2507506 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"2507506\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">\u1ee8ng d\u1ee5ng <br><small>ASTM D4917: Th\u1eed nghi\u1ec7m ma s\u00e1t t\u0129nh v\u00e0 ma s\u00e1t \u0111\u1ed9ng tr\u00ean gi\u1ea5y<\/small><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d337fc7 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"d337fc7\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"3229\" data-end=\"3390\">C\u00e1i <strong data-start=\"3233\" data-end=\"3260\">Th\u1eed nghi\u1ec7m h\u1ec7 s\u1ed1 ma s\u00e1t (COF) tr\u00ean gi\u1ea5y in<\/strong> l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu trong ng\u00e0nh gi\u1ea5y v\u00e0 in \u1ea5n \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 <strong data-start=\"3321\" data-end=\"3367\">kh\u1ea3 n\u0103ng n\u1ea1p li\u1ec7u, kh\u1ea3 n\u0103ng x\u1ebfp ch\u1ed3ng v\u00e0 kh\u1ea3 n\u0103ng v\u1eadn h\u00e0nh<\/strong>. C\u00e1c \u1ee9ng d\u1ee5ng bao g\u1ed3m:<\/p><ul data-start=\"3392\" data-end=\"3620\"><li class=\"\" data-start=\"3392\" data-end=\"3459\"><p class=\"\" data-start=\"3394\" data-end=\"3459\"><strong data-start=\"3394\" data-end=\"3424\">Th\u1eed nghi\u1ec7m h\u1ec7 s\u1ed1 ma s\u00e1t (COF) tr\u00ean gi\u1ea5y kh\u00f4ng tr\u00e1ng<\/strong> d\u00e0nh cho in \u1ea5n v\u0103n ph\u00f2ng v\u00e0 th\u01b0\u01a1ng m\u1ea1i<\/p><\/li><li class=\"\" data-start=\"3460\" data-end=\"3541\"><p class=\"\" data-start=\"3462\" data-end=\"3541\">Th\u1eed nghi\u1ec7m ma s\u00e1t trong <strong data-start=\"3482\" data-end=\"3498\">gi\u1ea5y d\u00e1n nh\u00e3n<\/strong>, v\u1eadt li\u1ec7u \u0111\u00f3ng g\u00f3i v\u00e0 b\u00eca s\u00f3ng<\/p><\/li><li class=\"\" data-start=\"3542\" data-end=\"3620\"><p class=\"\" data-start=\"3544\" data-end=\"3620\">\u0110\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch c\u1ee7a gi\u1ea5y trong <strong data-start=\"3581\" data-end=\"3620\">m\u00e1y in k\u1ef9 thu\u1eadt s\u1ed1 v\u00e0 m\u00e1y in offset<\/strong><\/p><\/li><\/ul><p class=\"\" data-start=\"3622\" data-end=\"3772\">C\u00e1c ph\u00e9p \u0111o COF \u0111\u00e1ng tin c\u1eady gi\u00fap c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t <strong data-start=\"3667\" data-end=\"3698\">t\u1ed1i \u01b0u h\u00f3a c\u00e1c ph\u01b0\u01a1ng ph\u00e1p x\u1eed l\u00fd b\u1ec1 m\u1eb7t<\/strong>, gi\u1ea3m <strong data-start=\"3707\" data-end=\"3733\">t\u1ef7 l\u1ec7 ng\u1eebng m\u00e1y<\/strong>, v\u00e0 \u0111\u1ea3m b\u1ea3o <strong data-start=\"3746\" data-end=\"3771\">s\u1ef1 h\u00e0i l\u00f2ng c\u1ee7a kh\u00e1ch h\u00e0ng<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2456f1d e-flex e-con-boxed e-con e-parent\" data-id=\"2456f1d\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4be0d7a elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"4be0d7a\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">C\u00e1c gi\u1ea3i ph\u00e1p ti\u00ean ti\u1ebfn cho th\u1eed nghi\u1ec7m ma s\u00e1t tr\u00ean gi\u1ea5y<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0424cfa e-con-full e-grid e-con e-child\" data-id=\"0424cfa\" data-element_type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-3a3fc5c e-con-full e-flex e-con e-child\" data-id=\"3a3fc5c\" data-element_type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;none&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9e1f2e3 elementor-invisible elementor-widget elementor-widget-image\" data-id=\"9e1f2e3\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInLeft&quot;}\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.coefficientfriction.com\/vi\/\">\n\t\t\t\t\t\t\t<img decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/coefficient-of-friction-testing-equipment-01.webp\" class=\"attachment-medium_large size-medium_large wp-image-96\" alt=\"Thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m h\u1ec7 s\u1ed1 ma s\u00e1t 01\" srcset=\"https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/coefficient-of-friction-testing-equipment-01.webp 600w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/coefficient-of-friction-testing-equipment-01-300x300.webp 300w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/coefficient-of-friction-testing-equipment-01-150x150.webp 150w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/elementor\/thumbs\/coefficient-of-friction-testing-equipment-01-r3gmfg1nnljvgm1sgd9e374sfjg8cayrot70czv2xs.webp 400w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/elementor\/thumbs\/coefficient-of-friction-testing-equipment-01-r3gmfg1ovgcb2m7iva4k79z5gvnv026hkls6iecayw.webp 500w, https:\/\/www.coefficientfriction.com\/wp-content\/uploads\/2025\/03\/elementor\/thumbs\/coefficient-of-friction-testing-equipment-01-r3gmfg1nwdb5s7ojc5fmiewgn0ak2nlwv641l9yiy0.webp 420w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a290580 e-con-full e-flex e-con e-child\" data-id=\"a290580\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-41e1fbd elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"41e1fbd\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInRight&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"3779\" data-end=\"3850\"><strong data-start=\"3779\" data-end=\"3850\">C\u00e1c gi\u1ea3i ph\u00e1p ti\u00ean ti\u1ebfn cho th\u1eed nghi\u1ec7m ma s\u00e1t: COF-01 c\u1ee7a Cell Instruments<\/strong><\/p><p class=\"\" data-start=\"3852\" data-end=\"4123\">\u0110\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a ti\u00eau chu\u1ea9n ASTM <a href=\"https:\/\/www.astm.org\/d4917-97r07.html\" target=\"_blank\" rel=\"noopener nofollow\">D4917<\/a> tu\u00e2n th\u1ee7, <strong data-start=\"3887\" data-end=\"3907\">Cell Instruments<\/strong> cung c\u1ea5p <a href=\"https:\/\/www.coefficientfriction.com\/vi\/\"><strong data-start=\"3919\" data-end=\"3960\">COF-01 - M\u00e1y \u0111o h\u1ec7 s\u1ed1 ma s\u00e1t<\/strong><\/a>, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 d\u1ec5 s\u1eed d\u1ee5ng. COF-01 h\u1ed7 tr\u1ee3 c\u1ea3 <strong data-start=\"4029\" data-end=\"4063\">Th\u1eed nghi\u1ec7m h\u1ec7 s\u1ed1 ma s\u00e1t t\u0129nh v\u00e0 \u0111\u1ed9ng<\/strong> theo ti\u00eau chu\u1ea9n ASTM D4917 v\u00e0 c\u00e1c ti\u00eau chu\u1ea9n li\u00ean quan kh\u00e1c.<\/p><p class=\"\" data-start=\"4125\" data-end=\"4162\"><strong data-start=\"4125\" data-end=\"4162\">C\u00e1c \u01b0u \u0111i\u1ec3m ch\u00ednh c\u1ee7a COF-01 bao g\u1ed3m:<\/strong><\/p><ul data-start=\"4164\" data-end=\"4493\"><li class=\"\" data-start=\"4164\" data-end=\"4212\"><p class=\"\" data-start=\"4166\" data-end=\"4212\">Ph\u00e1t hi\u1ec7n chuy\u1ec3n \u0111\u1ed9ng v\u00e0 l\u1ef1c ho\u00e0n to\u00e0n t\u1ef1 \u0111\u1ed9ng<\/p><\/li><li class=\"\" data-start=\"4213\" data-end=\"4271\"><p class=\"\" data-start=\"4215\" data-end=\"4271\">C\u1ea3m bi\u1ebfn l\u1ef1c c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao v\u00e0 m\u00e0n h\u00ecnh hi\u1ec3n th\u1ecb k\u1ef9 thu\u1eadt s\u1ed1 th\u1eddi gian th\u1ef1c<\/p><\/li><li class=\"\" data-start=\"4272\" data-end=\"4366\"><p class=\"\" data-start=\"4274\" data-end=\"4366\">Ph\u00f9 h\u1ee3p v\u1edbi <strong data-start=\"4287\" data-end=\"4314\">Th\u1eed nghi\u1ec7m h\u1ec7 s\u1ed1 ma s\u00e1t (COF) tr\u00ean gi\u1ea5y in<\/strong>, <strong data-start=\"4316\" data-end=\"4343\">Th\u1eed nghi\u1ec7m h\u1ec7 s\u1ed1 ma s\u00e1t (COF) tr\u00ean gi\u1ea5y kh\u00f4ng tr\u00e1ng<\/strong>, v\u00e0 c\u00e1c v\u1eadt li\u1ec7u kh\u00e1c<\/p><\/li><li class=\"\" data-start=\"4367\" data-end=\"4422\"><p class=\"\" data-start=\"4369\" data-end=\"4422\">Giao di\u1ec7n th\u00e2n thi\u1ec7n v\u1edbi ng\u01b0\u1eddi d\u00f9ng, h\u1ed7 tr\u1ee3 \u0111a ng\u00f4n ng\u1eef<\/p><\/li><li class=\"\" data-start=\"4423\" data-end=\"4493\"><p class=\"\" data-start=\"4425\" data-end=\"4493\">T\u01b0\u01a1ng th\u00edch v\u1edbi <strong data-start=\"4441\" data-end=\"4483\">thu th\u1eadp d\u1eef li\u1ec7u v\u00e0 l\u1eadp b\u00e1o c\u00e1o<\/strong> h\u1ec7 th\u1ed1ng<\/p><\/li><\/ul><p class=\"\" data-start=\"4495\" data-end=\"4660\">\u0110\u1ed1i v\u1edbi nh\u00e2n vi\u00ean ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 k\u1ef9 thu\u1eadt vi\u00ean ph\u00f2ng th\u00ed nghi\u1ec7m, COF-01 \u0111\u1ea3m b\u1ea3o <strong data-start=\"4561\" data-end=\"4603\">th\u1eed nghi\u1ec7m nhanh ch\u00f3ng, ch\u00ednh x\u00e1c v\u00e0 c\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i<\/strong>, gi\u00fap c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t gi\u1ea5y tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh v\u00e0 duy tr\u00ec kh\u1ea3 n\u0103ng c\u1ea1nh tranh.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6d2c64c e-flex e-con-boxed e-con e-parent\" data-id=\"6d2c64c\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c394047 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"c394047\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b484e06 elementor-invisible elementor-widget elementor-widget-n-accordion\" data-id=\"b484e06\" data-element_type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;max_items_expended&quot;:&quot;multiple&quot;,&quot;default_state&quot;:&quot;expanded&quot;,&quot;n_accordion_animation_duration&quot;:{&quot;unit&quot;:&quot;ms&quot;,&quot;size&quot;:400,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-accordion.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"e-n-accordion\" aria-label=\"Accordion. Nh\u1ea5n ph\u00edm Enter ho\u1eb7c ph\u00edm c\u00e1ch \u0111\u1ec3 m\u1edf li\u00ean k\u1ebft, nh\u1ea5n ph\u00edm Escape \u0111\u1ec3 \u0111\u00f3ng, v\u00e0 s\u1eed d\u1ee5ng c\u00e1c ph\u00edm m\u0169i t\u00ean \u0111\u1ec3 \u0111i\u1ec1u h\u01b0\u1edbng\">\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1890\" class=\"e-n-accordion-item\" open>\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"1\" tabindex=\"0\" aria-expanded=\"true\" aria-controls=\"e-n-accordion-item-1890\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 1. M\u1ee5c \u0111\u00edch c\u1ee7a ti\u00eau chu\u1ea9n ASTM D4917 l\u00e0 g\u00ec? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1890\" class=\"elementor-element elementor-element-4dda86b e-con-full e-flex e-con e-child\" data-id=\"4dda86b\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b1ee56f elementor-widget elementor-widget-text-editor\" data-id=\"b1ee56f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"5774\" data-end=\"6068\">Ti\u00eau chu\u1ea9n ASTM D4917 quy \u0111\u1ecbnh quy tr\u00ecnh \u0111o h\u1ec7 s\u1ed1 ma s\u00e1t t\u0129nh v\u00e0 \u0111\u1ed9ng c\u1ee7a gi\u1ea5y, \u0111\u1eb7c bi\u1ec7t l\u00e0 gi\u1ea5y in v\u00e0 gi\u1ea5y vi\u1ebft kh\u00f4ng tr\u00e1ng ph\u1ee7, nh\u1eb1m \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 in \u1ea5n v\u00e0 \u0111\u00f3ng g\u00f3i.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1891\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"2\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1891\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 2. Ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m n\u00e0y m\u00f4 ph\u1ecfng h\u00e0nh vi c\u1ee7a gi\u1ea5y trong \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf nh\u01b0 th\u1ebf n\u00e0o? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1891\" class=\"elementor-element elementor-element-4213cd7 e-con-full e-flex e-con e-child\" data-id=\"4213cd7\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a5cb0ea elementor-widget elementor-widget-text-editor\" data-id=\"a5cb0ea\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"6070\" data-end=\"6333\">Ph\u01b0\u01a1ng ph\u00e1p m\u1eb7t ph\u1eb3ng ngang m\u00f4 ph\u1ecfng qu\u00e1 tr\u00ecnh tr\u01b0\u1ee3t c\u1ee7a c\u00e1c t\u1edd gi\u1ea5y trong qu\u00e1 tr\u00ecnh n\u1ea1p v\u00e0 x\u1ebfp ch\u1ed3ng b\u1eb1ng m\u00e1y, do \u0111\u00f3 r\u1ea5t ph\u00f9 h\u1ee3p \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 c\u00e1c \u0111\u1eb7c t\u00ednh ma s\u00e1t \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c t\u00ecnh hu\u1ed1ng s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1892\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"3\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1892\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 3. Ti\u00eau chu\u1ea9n ASTM D4917 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho gi\u1ea5y tr\u00e1ng ph\u1ee7 ho\u1eb7c c\u00e1c lo\u1ea1i gi\u1ea5y chuy\u00ean d\u1ee5ng kh\u00f4ng? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1892\" class=\"elementor-element elementor-element-8cbaf70 e-con-full e-flex e-con e-child\" data-id=\"8cbaf70\" data-element_type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ed707d2 elementor-widget elementor-widget-text-editor\" data-id=\"ed707d2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"6335\" data-end=\"6581\">M\u1eb7c d\u00f9 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf d\u00e0nh cho gi\u1ea5y kh\u00f4ng tr\u00e1ng ph\u1ee7, ti\u00eau chu\u1ea9n ASTM D4917 v\u1eabn c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho c\u00e1c lo\u1ea1i gi\u1ea5y kh\u00e1c, v\u1edbi \u0111i\u1ec1u ki\u1ec7n c\u1ea7n l\u01b0u \u00fd r\u1eb1ng \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a k\u1ebft qu\u1ea3 c\u00f3 th\u1ec3 thay \u0111\u1ed5i do s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 t\u00ednh ch\u1ea5t b\u1ec1 m\u1eb7t.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1893\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"4\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1893\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 4. S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa h\u1ec7 s\u1ed1 ma s\u00e1t t\u0129nh v\u00e0 h\u1ec7 s\u1ed1 ma s\u00e1t \u0111\u1ed9ng trong th\u1eed nghi\u1ec7m gi\u1ea5y l\u00e0 g\u00ec? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1893\" class=\"elementor-element elementor-element-afe3920 e-flex e-con-boxed e-con e-child\" data-id=\"afe3920\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-932ab24 elementor-widget elementor-widget-text-editor\" data-id=\"932ab24\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"6583\" data-end=\"6846\">H\u1ec7 s\u1ed1 ma s\u00e1t t\u0129nh (COF) \u0111o l\u01b0\u1eddng m\u1ee9c \u0111\u1ed9 c\u1ea3n tr\u1edf khi b\u1eaft \u0111\u1ea7u chuy\u1ec3n \u0111\u1ed9ng, trong khi h\u1ec7 s\u1ed1 ma s\u00e1t \u0111\u1ed9ng (COF) \u0111o l\u01b0\u1eddng m\u1ee9c \u0111\u1ed9 c\u1ea3n tr\u1edf trong qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed9ng li\u00ean t\u1ee5c. C\u1ea3 hai y\u1ebfu t\u1ed1 n\u00e0y \u0111\u1ec1u r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c h\u00e0nh vi x\u1eed l\u00fd gi\u1ea5y.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1894\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"5\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1894\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> 5. S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ti\u00eau chu\u1ea9n ASTM D4197 v\u00e0 ASTM D4198 <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1894\" class=\"elementor-element elementor-element-f438e49 e-flex e-con-boxed e-con e-child\" data-id=\"f438e49\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ae2370c elementor-widget elementor-widget-text-editor\" data-id=\"ae2370c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"\" data-start=\"4711\" data-end=\"5075\">Kh\u00f4ng gi\u1ed1ng nh\u01b0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nh\u01b0 <strong data-start=\"4743\" data-end=\"4781\">ASTM D4918 (ph\u01b0\u01a1ng ph\u00e1p m\u1eb7t ph\u1eb3ng nghi\u00eang)<\/strong>, Ti\u00eau chu\u1ea9n ASTM D4917 quy \u0111\u1ecbnh <strong data-start=\"4803\" data-end=\"4832\">c\u00e1c ph\u00e9p \u0111o \u0111\u1ecbnh l\u01b0\u1ee3ng<\/strong> c\u1ea3 ma s\u00e1t t\u0129nh v\u00e0 ma s\u00e1t \u0111\u1ed9ng, v\u1ed1n l\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c to\u00e0n b\u1ed9 h\u00e0nh vi tr\u01b0\u1ee3t c\u1ee7a gi\u1ea5y. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch cho <strong data-start=\"4986\" data-end=\"5026\">gi\u1ea5y vi\u1ebft v\u00e0 in kh\u00f4ng tr\u00e1ng ph\u1ee7<\/strong>, n\u01a1i <strong data-start=\"5034\" data-end=\"5062\">hi\u1ec7u su\u1ea5t cho \u0103n \u0111\u1ed3ng \u0111\u1ec1u<\/strong> l\u00e0 r\u1ea5t quan tr\u1ecdng.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m h\u1ec7 s\u1ed1 ma s\u00e1t t\u0129nh v\u00e0 \u0111\u1ed9ng theo ph\u01b0\u01a1ng ph\u00e1p m\u1eb7t ph\u1eb3ng ngang: Hi\u1ec3u r\u00f5 h\u00e0nh vi ma s\u00e1t c\u1ee7a gi\u1ea5y l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u trong c\u00e1c quy tr\u00ecnh in \u1ea5n, gia c\u00f4ng v\u00e0 \u0111\u00f3ng g\u00f3i. Ti\u00eau chu\u1ea9n ASTM D4917 quy \u0111\u1ecbnh quy tr\u00ecnh ti\u00eau chu\u1ea9n \u0111\u1ec3 \u0111o h\u1ec7 s\u1ed1 ma s\u00e1t t\u0129nh v\u00e0 \u0111\u1ed9ng c\u1ee7a gi\u1ea5y in v\u00e0 gi\u1ea5y vi\u1ebft kh\u00f4ng tr\u00e1ng ph\u1ee7, h\u01b0\u1edbng d\u1eabn v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng [\u2026]<\/p>","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"footnotes":""},"class_list":["post-370","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/pages\/370","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/comments?post=370"}],"version-history":[{"count":6,"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/pages\/370\/revisions"}],"predecessor-version":[{"id":713,"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/pages\/370\/revisions\/713"}],"wp:attachment":[{"href":"https:\/\/www.coefficientfriction.com\/vi\/wp-json\/wp\/v2\/media?parent=370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}