{"id":706,"date":"2026-02-27T08:33:23","date_gmt":"2026-02-27T08:33:23","guid":{"rendered":"https:\/\/www.teartester.com\/?post_type=standard&#038;p=706"},"modified":"2026-02-28T08:22:12","modified_gmt":"2026-02-28T08:22:12","slug":"astm-d751","status":"publish","type":"standard","link":"https:\/\/www.teartester.com\/vi\/standard\/astm-d751\/","title":{"rendered":"ASTM D751"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Ti\u00eau chu\u1ea9n v\u1ec1 \u0111\u1ed9 b\u1ec1n r\u00e1ch c\u1ee7a v\u1ea3i v\u00e0 t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1i <strong>ASTM D751 l\u00e0 ti\u00eau chu\u1ea9n v\u1ec1 \u0111\u1ed9 b\u1ec1n x\u00e9 c\u1ee7a v\u1ea3i<\/strong> \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c lo\u1ea1i v\u1ea3i tr\u00e1ng ph\u1ee7 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong l\u1ec1u, b\u1ea1t che, qu\u1ea7n \u00e1o b\u1ea3o h\u1ed9, s\u1ea3n ph\u1ea9m y t\u1ebf v\u00e0 n\u1ed9i th\u1ea5t \u00f4 t\u00f4 duy tr\u00ec kh\u1ea3 n\u0103ng ch\u1ed1ng r\u00e1ch \u0111\u1ee7 cao khi ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c l\u1ef1c b\u00ean ngo\u00e0i. Kh\u00e1c v\u1edbi c\u00e1c th\u1eed nghi\u1ec7m k\u00e9o \u0111\u01a1n thu\u1ea7n, th\u1eed nghi\u1ec7m kh\u1ea3 n\u0103ng ch\u1ed1ng r\u00e1ch t\u1eadp trung v\u00e0o vi\u1ec7c m\u1ed9t v\u00f9ng \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1eaft s\u1eb5n ho\u1eb7c b\u1ecb h\u01b0 h\u1ecfng t\u1ef1 nhi\u00ean s\u1ebd ti\u1ebfp t\u1ee5c lan r\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o khi ch\u1ecbu t\u1ea3i tr\u1ecdng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e1nh gi\u00e1 n\u00e0y gi\u00fap ng\u01b0\u1eddi d\u00f9ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>X\u00e1c \u0111\u1ecbnh c\u00e1c \u0111i\u1ec3m y\u1ebfu v\u1ec1 c\u1ea5u tr\u00fac do \u0111\u1ed9 d\u00e0y l\u1edbp ph\u1ee7, c\u1ea5u tr\u00fac v\u1ea3i ho\u1eb7c \u0111\u1ed9 b\u00e1m d\u00ednh gi\u1eefa c\u00e1c l\u1edbp g\u00e2y ra<\/li>\n\n\n\n<li>So s\u00e1nh c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u \u0111\u1ec3 ph\u00e1t tri\u1ec3n s\u1ea3n ph\u1ea9m<\/li>\n\n\n\n<li>\u0110\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh v\u1ec1 mua s\u1eafm v\u00e0 ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt<\/li>\n\n\n\n<li>D\u1ef1 \u0111o\u00e1n hi\u1ec7u su\u1ea5t th\u1ef1c t\u1ebf v\u00e0 \u0111\u1ed9 b\u1ec1n l\u00e2u d\u00e0i<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ti\u00eau chu\u1ea9n ASTM D751 quy \u0111\u1ecbnh c\u00e1c ph\u01b0\u01a1ng ph\u00e1p th\u1eed \u0111\u1ed9 r\u00e1ch kh\u00e1c nhau, gi\u00fap vi\u1ec7c gi\u1ea3i th\u00edch k\u1ebft qu\u1ea3 tr\u1edf n\u00ean ch\u00ednh x\u00e1c h\u01a1n v\u00e0 ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi t\u1eebng \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Th\u1eed nghi\u1ec7m \u0111\u1ed9 r\u00e1ch c\u1ee7a v\u1ea3i theo ti\u00eau chu\u1ea9n ASTM D751<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3 m\u1ed9t s\u1ed1 ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c ph\u00e9p \u00e1p d\u1ee5ng cho <strong>Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n r\u00e1ch c\u1ee7a v\u1ea3i<\/strong>, nh\u01b0ng ti\u00eau chu\u1ea9n n\u00e0y th\u01b0\u1eddng t\u1eadp trung v\u00e0o hai ph\u01b0\u01a1ng ph\u00e1p: ph\u01b0\u01a1ng ph\u00e1p con l\u1eafc v\u00e0 ph\u01b0\u01a1ng ph\u00e1p r\u00e1ch l\u01b0\u1ee1i. C\u00e1c th\u1eed nghi\u1ec7m n\u00e0y m\u00f4 ph\u1ecfng c\u00e1c t\u00ecnh hu\u1ed1ng h\u01b0 h\u1ecfng trong th\u1ef1c t\u1ebf, trong \u0111\u00f3 m\u1ed9t v\u1ebft c\u1eaft nh\u1ecf c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c lan r\u1ed9ng khi ch\u1ecbu l\u1ef1c k\u00e9o.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ph\u01b0\u01a1ng ph\u00e1p con l\u1eafc<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y d\u1ef1a tr\u00ean ti\u00eau chu\u1ea9n ASTM D1424 v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c lo\u1ea1i v\u1ea3i tr\u00e1ng ph\u1ee7 th\u00f4ng th\u01b0\u1eddng. M\u1ed9t con l\u1eafc s\u1ebd x\u00e9 m\u1eabu v\u00e0 \u0111o l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft \u0111\u1ec3 ti\u1ebfp t\u1ee5c qu\u00e1 tr\u00ecnh x\u00e9. C\u1ea5u h\u00ecnh \u0111\u01a1n gi\u1ea3n c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p n\u00e0y khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn cho c\u00e1c th\u1eed nghi\u1ec7m \u0111\u1ecbnh k\u1ef3.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Ph\u01b0\u01a1ng ph\u00e1p x\u00e9 l\u01b0\u1ee1i<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p v\u1ea3i kh\u00f4ng b\u1ecb nh\u0103n l\u1ea1i tr\u01b0\u1edbc khi r\u00e1ch, ph\u01b0\u01a1ng ph\u00e1p r\u00e1ch l\u01b0\u1ee1i mang l\u1ea1i \u0111\u1ed9 ch\u00ednh x\u00e1c cao h\u01a1n. M\u1ed9t m\u1eabu v\u1ea3i \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1eaft s\u1eb5n \u0111\u01b0\u1ee3c k\u00e9o theo hai h\u01b0\u1edbng, t\u1ea1o th\u00e0nh hai \u201cl\u01b0\u1ee1i\u201d. L\u1ef1c c\u1ea7n thi\u1ebft \u0111\u1ec3 ti\u1ebfp t\u1ee5c qu\u00e1 tr\u00ecnh r\u00e1ch \u0111\u01b0\u1ee3c ghi l\u1ea1i trong su\u1ed1t qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch khi ph\u00e2n t\u00edch c\u00e1c lo\u1ea1i v\u1ea3i gia c\u1ed1 ho\u1eb7c v\u1ea3i tr\u00e1ng ph\u1ee7 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ecbu t\u1ea3i n\u1eb7ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u0110\u1ed9 b\u1ec1n r\u00e1ch c\u1ee7a v\u1ea3i: Y\u00eau c\u1ea7u \u0111\u1ed1i v\u1edbi m\u1eabu th\u1eed<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u0110\u1ed9 b\u1ec1n r\u00e1ch c\u1ee7a v\u1ea3i<\/strong> Vi\u1ec7c x\u00e9t nghi\u1ec7m \u0111\u00f2i h\u1ecfi ph\u1ea3i c\u00f3 m\u1eabu th\u1eed \u0111\u01b0\u1ee3c chu\u1ea9n b\u1ecb ch\u00ednh x\u00e1c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh ch\u00ednh x\u00e1c c\u1ee7a k\u1ebft qu\u1ea3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Th\u01b0\u1eddng s\u1eed d\u1ee5ng c\u00e1c h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 k\u00edch th\u01b0\u1edbc 76 \u00d7 203 mm.<\/li>\n\n\n\n<li>Ph\u1ea3i ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m n\u0103m m\u1eabu theo chi\u1ec1u d\u1ecdc v\u00e0 n\u0103m m\u1eabu theo chi\u1ec1u ngang.<\/li>\n\n\n\n<li>Kh\u00f4ng n\u00ean c\u00f3 hai m\u1eabu n\u00e0o ch\u1ee9a c\u00e1c s\u1ee3i gi\u1ed1ng h\u1ec7t nhau \u0111\u1ec3 tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng nhi\u1ec5u ho\u1eb7c d\u1eef li\u1ec7u tr\u00f9ng l\u1eb7p.<\/li>\n\n\n\n<li>M\u1ed9t v\u1ebft c\u1eaft c\u00f3 ki\u1ec3m so\u00e1t d\u00e0i 76 mm t\u1ea1o th\u00e0nh \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u c\u1ee7a v\u1ebft r\u00e1ch.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c tu\u00e2n th\u1ee7 nghi\u00eam ng\u1eb7t c\u00e1c quy t\u1eafc chu\u1ea9n b\u1ecb \u0111\u1ea3m b\u1ea3o t\u00ednh l\u1eb7p l\u1ea1i v\u00e0 kh\u1ea3 n\u0103ng so s\u00e1nh gi\u1eefa c\u00e1c m\u1ebb th\u1eed nghi\u1ec7m.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n r\u00e1ch h\u00ecnh thang \u0111\u1ed1i v\u1edbi v\u1ea3i gia c\u1ed1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec1u lo\u1ea1i v\u1ea3i tr\u00e1ng ph\u1ee7 c\u1ea7n ph\u1ea3i <strong>Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n r\u00e1ch h\u00ecnh thang<\/strong> v\u00ec n\u00f3 m\u00f4 ph\u1ecfng t\u1ed1t h\u01a1n c\u00e1c t\u1ea3i tr\u1ecdng \u0111a h\u01b0\u1edbng. D\u1ea5u hi\u1ec7u h\u00ecnh thang v\u00e0 \u0111\u01b0\u1eddng c\u1eaft s\u1eb5n gi\u00fap t\u1eadp trung \u1ee9ng su\u1ea5t v\u00e0o m\u1ed9t khu v\u1ef1c \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong quy tr\u00ecnh n\u00e0y:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>K\u00edch th\u01b0\u1edbc m\u1eabu l\u00e0 76 \u00d7 152 mm.<\/li>\n\n\n\n<li>M\u1ed9t v\u1ebft c\u1eaft d\u00e0i 15,9 mm g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng r\u00e1ch.<\/li>\n\n\n\n<li>C\u00e1c c\u1ea1nh c\u1ee7a h\u00ecnh thang \u0111\u01b0\u1ee3c k\u1eb9p ch\u1eb7t \u0111\u1ec3 t\u1ea1o ra l\u1ef1c t\u00e1c d\u1ee5ng \u0111\u1ec1u.<\/li>\n\n\n\n<li>C\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n nhi\u1ec1u \u0111\u1ec9nh v\u00e0 \u0111\u00e1y tr\u01b0\u1edbc khi ch\u1ec9 s\u1ed1 \u0111\u1ea1t m\u1ee9c t\u0103ng l\u1ef1c 25%, sau \u0111\u00f3 m\u1edbi ti\u1ebfn h\u00e0nh ghi nh\u1eadn k\u1ebft qu\u1ea3.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y m\u00f4 ph\u1ecfng ch\u00ednh x\u00e1c hi\u1ec7n t\u01b0\u1ee3ng r\u00e1ch kh\u00f4ng \u0111\u1ec1u th\u01b0\u1eddng th\u1ea5y \u1edf c\u00e1c lo\u1ea1i v\u1ea3i tr\u00e1ng ph\u1ee7 v\u00e0 v\u1ea3i gh\u00e9p l\u1edbp.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ph\u01b0\u01a1ng ph\u00e1p th\u1eed \u0111\u1ed9 b\u1ec1n r\u00e1ch c\u1ee7a v\u1ea3i v\u00e0 vi\u1ec7c l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ecdn m\u1ed9t <strong>Ph\u01b0\u01a1ng ph\u00e1p th\u1eed \u0111\u1ed9 b\u1ec1n r\u00e1ch c\u1ee7a v\u1ea3i<\/strong> ph\u1ee5 thu\u1ed9c v\u00e0o c\u1ea5u tr\u00fac v\u1ea3i, \u0111\u1eb7c t\u00ednh l\u1edbp ph\u1ee7 v\u00e0 c\u00e1c y\u00eau c\u1ea7u v\u1ec1 hi\u1ec7u su\u1ea5t. \u0110\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a k\u1ebft qu\u1ea3 c\u0169ng ph\u1ee5 thu\u1ed9c r\u1ea5t nhi\u1ec1u v\u00e0o thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi ti\u00eau chu\u1ea9n ASTM D751, m\u00e1y th\u1eed nghi\u1ec7m ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u nghi\u00eam ng\u1eb7t v\u1ec1:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>K\u00edch th\u01b0\u1edbc h\u00e0m (25 \u00d7 50 mm tr\u1edf l\u00ean)<\/li>\n\n\n\n<li>T\u1ed1c \u0111\u1ed9 k\u1eb9p \u0111\u1ed3ng \u0111\u1ec1u (0,85 mm\/s ho\u1eb7c 5 mm\/s t\u00f9y theo ph\u01b0\u01a1ng ph\u00e1p)<\/li>\n\n\n\n<li>K\u1eb9p ch\u1eafc ch\u1eafn, kh\u00f4ng b\u1ecb tr\u01b0\u1ee3t<\/li>\n\n\n\n<li>Kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i ph\u00f9 h\u1ee3p (l\u1ef1c t\u00e1c \u0111\u1ed9ng ph\u1ea3i n\u1eb1m trong kho\u1ea3ng t\u1eeb 15% \u0111\u1ebfn 85% so v\u1edbi c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb: M\u00e1y th\u1eed \u0111\u1ed9 b\u1ec1n k\u00e9o Cell Instruments TST-01<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1i <strong>M\u00e1y th\u1eed \u0111\u1ed9 b\u1ec1n k\u00e9o TST-01<\/strong> cung c\u1ea5p m\u1ed9t gi\u1ea3i ph\u00e1p \u0111\u00e1ng tin c\u1eady cho th\u1eed nghi\u1ec7m \u0111\u1ed9 r\u00e1ch theo ti\u00eau chu\u1ea9n ASTM D751. H\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n PLC \u1ed5n \u0111\u1ecbnh, tr\u1ee5c v\u00edt bi ch\u00ednh x\u00e1c, d\u1ea3i t\u1ed1c \u0111\u1ed9 r\u1ed9ng (1\u2013500 mm\/ph\u00fat) c\u00f9ng kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m \u0111\u1ed9 r\u00e1ch khi\u1ebfn thi\u1ebft b\u1ecb n\u00e0y tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng cho c\u1ea3 ph\u00f2ng th\u00ed nghi\u1ec7m R&amp;D l\u1eabn c\u00e1c \u0111\u1ed9i ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng trong s\u1ea3n xu\u1ea5t. M\u00e0n h\u00ecnh hi\u1ec3n th\u1ecb \u0111\u01b0\u1eddng cong th\u1eddi gian th\u1ef1c, \u0111\u1ed9 ch\u00ednh x\u00e1c d\u1ecbch chuy\u1ec3n v\u01b0\u1ee3t tr\u1ed9i v\u00e0 c\u00e1c t\u00f9y ch\u1ecdn xu\u1ea5t d\u1eef li\u1ec7u linh ho\u1ea1t gi\u00fap ng\u01b0\u1eddi d\u00f9ng thu \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c v\u00e0 c\u00f3 th\u1ec3 truy xu\u1ea5t ngu\u1ed3n g\u1ed1c.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Th\u1eed nghi\u1ec7m \u0111\u1ed9 r\u00e1ch c\u1ee7a v\u1ea3i: \u1ee8ng d\u1ee5ng th\u1ef1c ti\u1ec5n trong c\u00f4ng nghi\u1ec7p<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Khi th\u1ef1c hi\u1ec7n m\u1ed9t <strong>Th\u1eed nghi\u1ec7m \u0111\u1ed9 r\u00e1ch c\u1ee7a v\u1ea3i<\/strong>, ng\u01b0\u1eddi d\u00f9ng s\u1ebd c\u00f3 \u0111\u01b0\u1ee3c nh\u1eefng th\u00f4ng tin chi ti\u1ebft r\u00f5 r\u00e0ng v\u1ec1:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u1ea2nh h\u01b0\u1edfng c\u1ee7a \u0111\u1ed9 b\u00e1m d\u00ednh l\u1edbp ph\u1ee7 \u0111\u1ed1i v\u1edbi s\u1ef1 lan truy\u1ec1n v\u1ebft r\u00e1ch<\/li>\n\n\n\n<li>C\u1ea5u tr\u00fac v\u1ea3i \u1ea3nh h\u01b0\u1edfng nh\u01b0 th\u1ebf n\u00e0o \u0111\u1ebfn h\u01b0\u1edbng r\u00e1ch<\/li>\n\n\n\n<li>Li\u1ec7u c\u00e1c khuy\u1ebft t\u1eadt trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t c\u00f3 g\u00e2y ra s\u1ef1 suy gi\u1ea3m kh\u1ea3 n\u0103ng ch\u1ed1ng r\u00e1ch hay kh\u00f4ng<\/li>\n\n\n\n<li>C\u00e1c nguy\u00ean li\u1ec7u nh\u1eadp v\u1ec1 c\u00f3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt c\u1ee7a kh\u00e1ch h\u00e0ng hay kh\u00f4ng<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc nhu c\u1ea7u ng\u00e0y c\u00e0ng t\u0103ng v\u1ec1 c\u00e1c lo\u1ea1i v\u1ea3i ph\u1ee7 c\u00f3 \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 ch\u1eafc ch\u1eafn cao h\u01a1n, c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p \u0111\u1ec1u d\u1ef1a v\u00e0o ti\u00eau chu\u1ea9n ASTM D751 l\u00e0m ti\u00eau chu\u1ea9n tham chi\u1ebfu \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng.<\/p>","protected":false},"featured_media":0,"parent":0,"template":"","meta":{"_acf_changed":true},"standard-category":[2],"class_list":["post-706","standard","type-standard","status-publish","hentry","standard-category-astm"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.teartester.com\/vi\/wp-json\/wp\/v2\/standard\/706","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.teartester.com\/vi\/wp-json\/wp\/v2\/standard"}],"about":[{"href":"https:\/\/www.teartester.com\/vi\/wp-json\/wp\/v2\/types\/standard"}],"wp:attachment":[{"href":"https:\/\/www.teartester.com\/vi\/wp-json\/wp\/v2\/media?parent=706"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.teartester.com\/vi\/wp-json\/wp\/v2\/standard-category?post=706"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}