{"id":5854,"date":"2025-12-25T03:55:56","date_gmt":"2025-12-25T03:55:56","guid":{"rendered":"https:\/\/korea-transmission.com\/?p=5854"},"modified":"2025-12-25T03:55:56","modified_gmt":"2025-12-25T03:55:56","slug":"gb-9074-combination-screws-specs-guide","status":"publish","type":"post","link":"https:\/\/korea-transmission.com\/vi\/blog\/gb-9074-combination-screws-specs-guide\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u1ed1c v\u00edt k\u1ebft h\u1ee3p GB 9074"},"content":{"rendered":"<h2>Gi\u1edbi thi\u1ec7u v\u1ec1 \u1ed1c v\u00edt k\u1ebft h\u1ee3p<\/h2>\n<p>V\u00edt t\u1ed5 h\u1ee3p, theo \u0111\u1ecbnh ngh\u0129a trong b\u1ed9 ti\u00eau chu\u1ea9n GB 9074, l\u00e0 c\u00e1c c\u1ee5m l\u1eafp r\u00e1p t\u00edch h\u1ee3p bao g\u1ed3m v\u00edt, v\u00f2ng \u0111\u1ec7m l\u00f2 xo v\u00e0 v\u00f2ng \u0111\u1ec7m ph\u1eb3ng. C\u00e1c ti\u00eau chu\u1ea9n n\u00e0y \u0111\u1ea3m b\u1ea3o t\u00ednh \u0111\u1ed3ng nh\u1ea5t v\u1ec1 thi\u1ebft k\u1ebf, k\u00edch th\u01b0\u1edbc v\u00e0 hi\u1ec7u su\u1ea5t \u0111\u1ec3 s\u1eed d\u1ee5ng \u0111\u00e1ng tin c\u1eady trong c\u00e1c \u1ee9ng d\u1ee5ng c\u01a1 kh\u00ed v\u00e0 \u0111i\u1ec7n. GB9074.4 quy \u0111\u1ecbnh v\u1ec1 v\u00edt \u0111\u1ea7u tr\u00f2n c\u00f3 r\u00e3nh ch\u1eef th\u1eadp k\u00e8m v\u00f2ng \u0111\u1ec7m, GB9074.8 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c bi\u1ebfn th\u1ec3 v\u00edt \u0111\u1ea7u tr\u00f2n nh\u1ecf c\u00f3 r\u00e3nh ch\u1eef th\u1eadp, v\u00e0 GB9074.13 quy \u0111\u1ecbnh c\u00e1c c\u1ee5m v\u00edt \u0111\u1ea7u l\u1ee5c gi\u00e1c c\u00f3 r\u00e3nh ch\u1eef th\u1eadp. C\u00e1c v\u00edt n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 cung c\u1ea5p c\u00e1c \u0111\u1eb7c t\u00ednh ch\u1ed1ng n\u1edbi l\u1ecfng th\u00f4ng qua c\u00e1c v\u00f2ng \u0111\u1ec7m \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p, t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 b\u1ec1n c\u1ee7a m\u1ed1i n\u1ed1i d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a rung \u0111\u1ed9ng ho\u1eb7c t\u1ea3i tr\u1ecdng \u0111\u1ed9ng.<\/p>\n<p>Trong s\u1ea3n xu\u1ea5t, c\u00e1c lo\u1ea1i th\u00e9p kh\u00f4ng g\u1ec9 nh\u01b0 SUS304 v\u00e0 SUS316 chi\u1ebfm \u01b0u th\u1ebf v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n, trong khi c\u00e1c lo\u1ea1i th\u00e9p carbon (v\u00ed d\u1ee5: 1010, 1018, 10B21) c\u00f3 s\u1eb5n cho c\u00e1c y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 b\u1ec1n cao h\u01a1n, m\u1eb7c d\u00f9 ch\u00fang c\u1ea7n ph\u1ea3i tr\u1ea3i qua qu\u00e1 tr\u00ecnh x\u1eed l\u00fd nhi\u1ec7t v\u00e0 m\u1ea1. H\u01b0\u1edbng d\u1eabn n\u00e0y d\u1ef1a tr\u00ean c\u00e1c ti\u00eau chu\u1ea9n qu\u1ed1c gia \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp \u0111\u1ec3 cung c\u1ea5p c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt chi ti\u1ebft, h\u1ed7 tr\u1ee3 c\u00e1c k\u1ef9 s\u01b0 trong vi\u1ec7c l\u1ef1a ch\u1ecdn v\u00e0 \u1ee9ng d\u1ee5ng nh\u1eb1m \u0111\u1ea1t hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh.<\/p>\n<h2>C\u00e1c lo\u1ea1i v\u00e0 c\u1ea5u h\u00ecnh<\/h2>\n<p>\u1ed0c v\u00edt k\u1ebft h\u1ee3p c\u00f3 nhi\u1ec1u ki\u1ec3u \u0111\u1ea7u v\u00edt v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn l\u1eafp r\u00e1p kh\u00e1c nhau:<\/p>\n<ul>\n<li><strong>\u0110\u1ea7u Pan (GB9074.4):<\/strong> S\u1ea3n ph\u1ea9m c\u00f3 \u0111\u1ea7u l\u1edbn h\u01a1n, d\u00e0y h\u01a1n \u0111\u1ec3 ph\u00e2n b\u1ed5 t\u1ea3i tr\u1ecdng r\u1ed9ng h\u01a1n, d\u1ef1a tr\u00ean ti\u00eau chu\u1ea9n v\u00edt \u0111\u1ea7u ph\u1eb3ng r\u00e3nh ch\u1eef th\u1eadp GB818.<\/li>\n<li><strong>\u0110\u1ea7u Pan nh\u1ecf (GB9074.8):<\/strong> So v\u1edbi ti\u00eau chu\u1ea9n GB9074.4, \u0111\u1ea7u v\u00edt n\u00e0y nh\u1ecf v\u00e0 m\u1ecfng h\u01a1n, t\u01b0\u01a1ng th\u00edch v\u1edbi v\u00edt \u0111\u1ea7u ph\u1eb3ng nh\u1ecf c\u00f3 r\u00e3nh ch\u1eef th\u1eadp GB823, ph\u00f9 h\u1ee3p cho c\u00e1c c\u00f4ng tr\u00ecnh c\u00f3 kh\u00f4ng gian h\u1ea1n ch\u1ebf.<\/li>\n<li><strong>\u0110\u1ea7u l\u1ee5c gi\u00e1c c\u00f3 r\u00e3nh ch\u1eef th\u1eadp (GB9074.13):<\/strong> K\u1ebft h\u1ee3p c\u01a1 c\u1ea5u si\u1ebft l\u1ef1c h\u00ecnh l\u1ee5c gi\u00e1c v\u1edbi r\u00e3nh ch\u1eef th\u1eadp, tu\u00e2n theo ti\u00eau chu\u1ea9n GB29.2, l\u00fd t\u01b0\u1edfng cho c\u00e1c nhu c\u1ea7u si\u1ebft l\u1ef1c cao.<\/li>\n<\/ul>\n<p>M\u1ed7i lo\u1ea1i bao g\u1ed3m m\u1ed9t v\u00f2ng \u0111\u1ec7m l\u00f2 xo (GB9074.26) v\u00e0 m\u1ed9t v\u00f2ng \u0111\u1ec7m ph\u1eb3ng (GB9074.24 ho\u1eb7c GB97.4), \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ri\u00eang \u0111\u1ec3 s\u1eed d\u1ee5ng k\u1ebft h\u1ee3p thay v\u00ec c\u00e1c b\u1ed9 ph\u1eadn ti\u00eau chu\u1ea9n c\u00f3 s\u1eb5n, \u0111\u1ea3m b\u1ea3o s\u1ef1 v\u1eeba v\u1eb7n v\u00e0 ch\u1ee9c n\u0103ng ch\u00ednh x\u00e1c.<\/p>\n<h2>Th\u00f4ng s\u1ed1 k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n cho GB9074.4<\/h2>\n<p>Ti\u00eau chu\u1ea9n GB9074.4 quy \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc cho v\u00edt \u0111\u1ea7u ph\u1eb3ng c\u00f3 r\u00e3nh ch\u1eef th\u1eadp. Th\u00e0nh ph\u1ea7n v\u00edt tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n GB818, v\u1edbi c\u00e1c c\u1ee5m v\u00edt c\u00f3 chi\u1ec1u d\u00e0i t\u1eeb 5 mm \u0111\u1ebfn 90 mm, v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi c\u00e1c ph\u1ea1m vi ti\u00eau chu\u1ea9n v\u1ec1 t\u00ednh linh ho\u1ea1t. C\u00e1c th\u00f4ng s\u1ed1 ch\u00ednh bao g\u1ed3m b\u01b0\u1edbc ren, \u0111\u01b0\u1eddng k\u00ednh \u0111\u1ea7u (dk), chi\u1ec1u cao \u0111\u1ea7u (k) v\u00e0 chi ti\u1ebft r\u00e3nh. T\u1ea5t c\u1ea3 c\u00e1c ph\u00e9p \u0111o \u0111\u1ec1u t\u00ednh b\u1eb1ng milim\u00e9t.<\/p>\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table style=\"width: 100%;\">\n<thead>\n<tr>\n<th colspan=\"3\">Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ren d<\/th>\n<th>M2.5<\/th>\n<th>M3<\/th>\n<th>M3.5<\/th>\n<th>M4<\/th>\n<th>M5<\/th>\n<th>M6<\/th>\n<th>M8<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td colspan=\"3\">Cao \u0111\u1ed9 p<\/td>\n<td>0.45<\/td>\n<td>0.5<\/td>\n<td>0.6<\/td>\n<td>0.7<\/td>\n<td>0.8<\/td>\n<td>1<\/td>\n<td>1.25<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">\u0110\u01b0\u1eddng k\u00ednh \u0111\u1ea7u dk<\/td>\n<td colspan=\"2\">t\u1ed1i \u0111a<\/td>\n<td>5<\/td>\n<td>5.6<\/td>\n<td>7<\/td>\n<td>8<\/td>\n<td>9.5<\/td>\n<td>12<\/td>\n<td>16<\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\">ph\u00fat<\/td>\n<td>4.7<\/td>\n<td>5.3<\/td>\n<td>6.64<\/td>\n<td>7.64<\/td>\n<td>9.14<\/td>\n<td>11.57<\/td>\n<td>15.57<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">\u0110\u1ed9 d\u00e0y \u0111\u1ea7u k<\/td>\n<td colspan=\"2\">t\u1ed1i \u0111a<\/td>\n<td>2.1<\/td>\n<td>2.4<\/td>\n<td>2.6<\/td>\n<td>3.1<\/td>\n<td>3.7<\/td>\n<td>4.6<\/td>\n<td>6<\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\">ph\u00fat<\/td>\n<td>1.96<\/td>\n<td>2.26<\/td>\n<td>2.46<\/td>\n<td>2.92<\/td>\n<td>3.52<\/td>\n<td>4.3<\/td>\n<td>5.7<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"4\">H\u1ed1c ch\u1eef th\u1eadp<\/td>\n<td colspan=\"2\">Gi\u1edd gi\u1ea3i lao s\u1ed1...<\/td>\n<td>1<\/td>\n<td>2<\/td>\n<td>2<\/td>\n<td>2<\/td>\n<td>2<\/td>\n<td>3<\/td>\n<td>4<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">\u0110\u1ed9 s\u00e2u xuy\u00ean th\u1ea5u<\/td>\n<td>t\u1ed1i \u0111a<\/td>\n<td>1.55<\/td>\n<td>1.43<\/td>\n<td>1.9<\/td>\n<td>2.4<\/td>\n<td>2.9<\/td>\n<td>3.6<\/td>\n<td>4.6<\/td>\n<\/tr>\n<tr>\n<td>ph\u00fat<\/td>\n<td>1.15<\/td>\n<td>0.86<\/td>\n<td>1.4<\/td>\n<td>1.9<\/td>\n<td>2.4<\/td>\n<td>3.1<\/td>\n<td>4<\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\">Chi\u1ec1u r\u1ed9ng m<\/td>\n<td>2.7<\/td>\n<td>3.5<\/td>\n<td>3.9<\/td>\n<td>4.4<\/td>\n<td>4.9<\/td>\n<td>6.9<\/td>\n<td>9<\/td>\n<\/tr>\n<tr>\n<td colspan=\"3\">Chi\u1ec1u d\u00e0i L<\/td>\n<td>6-25<\/td>\n<td>6-30<\/td>\n<td>6-60<\/td>\n<td>6-60<\/td>\n<td>8-60<\/td>\n<td>10-60<\/td>\n<td>12-40<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>C\u00e1c k\u00edch th\u01b0\u1edbc n\u00e0y \u0111\u1ea3m b\u1ea3o t\u00ednh t\u01b0\u01a1ng th\u00edch; \u0111\u1ed1i v\u1edbi chi\u1ec1u d\u00e0i m\u1edf r\u1ed9ng l\u00ean \u0111\u1ebfn 90 mm, vui l\u00f2ng li\u00ean h\u1ec7 nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1ec3 \u0111\u1eb7t h\u00e0ng s\u1ea3n xu\u1ea5t theo y\u00eau c\u1ea7u.<\/p>\n<h2>Th\u00f4ng s\u1ed1 k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n cho GB9074.8<\/h2>\n<p>Ti\u00eau chu\u1ea9n GB9074.8 quy \u0111\u1ecbnh th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt cho v\u00edt k\u1ebft h\u1ee3p \u0111\u1ea7u tr\u00f2n nh\u1ecf c\u00f3 r\u00e3nh ch\u1eef th\u1eadp, v\u1edbi \u0111\u1ea7u v\u00edt nh\u1ecf h\u01a1n v\u00e0 m\u1ecfng h\u01a1n so v\u1edbi GB9074.4. D\u1ef1a tr\u00ean ti\u00eau chu\u1ea9n GB823, chi\u1ec1u d\u00e0i v\u00edt dao \u0111\u1ed9ng t\u1eeb 6 mm \u0111\u1ebfn 60 mm theo ti\u00eau chu\u1ea9n, c\u00f3 th\u1ec3 k\u00e9o d\u00e0i \u0111\u1ebfn 90 mm. L\u01b0u \u00fd s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 r\u00e3nh: M5 s\u1eed d\u1ee5ng r\u00e3nh s\u1ed1 3 trong GB9074.8 so v\u1edbi r\u00e3nh s\u1ed1 2 trong GB9074.4.<\/p>\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table style=\"width: 100%;\">\n<thead>\n<tr>\n<th colspan=\"2\">\u0110\u01b0\u1eddng k\u00ednh danh ngh\u0129a d<\/th>\n<th>M2<\/th>\n<th>M3<\/th>\n<th>M4<\/th>\n<th>M5<\/th>\n<th>M6<\/th>\n<th>M8<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td colspan=\"2\">Cao \u0111\u1ed9 P<\/td>\n<td>0.4<\/td>\n<td>0.5<\/td>\n<td>0.7<\/td>\n<td>0.8<\/td>\n<td>1<\/td>\n<td>1.25<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">dk<\/td>\n<td>t\u1ed1i \u0111a<\/td>\n<td>3.5<\/td>\n<td>5.5<\/td>\n<td>7.0<\/td>\n<td>9.0<\/td>\n<td>10.5<\/td>\n<td>14.0<\/td>\n<\/tr>\n<tr>\n<td>ph\u00fat<\/td>\n<td>3.2<\/td>\n<td>5.2<\/td>\n<td>6.64<\/td>\n<td>8.64<\/td>\n<td>10.07<\/td>\n<td>13.57<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">k<\/td>\n<td>t\u1ed1i \u0111a<\/td>\n<td>1.4<\/td>\n<td>2.15<\/td>\n<td>2.75<\/td>\n<td>3.45<\/td>\n<td>4.1<\/td>\n<td>5.4<\/td>\n<\/tr>\n<tr>\n<td>ph\u00fat<\/td>\n<td>1.26<\/td>\n<td>2.01<\/td>\n<td>2.61<\/td>\n<td>3.27<\/td>\n<td>3.8<\/td>\n<td>5.1<\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\">Gi\u1edd gi\u1ea3i lao s\u1ed1...<\/td>\n<td>1<\/td>\n<td colspan=\"2\">2<\/td>\n<td colspan=\"3\">3<\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\">Chi\u1ec1u d\u00e0i L<\/td>\n<td>6-25<\/td>\n<td>6-30<\/td>\n<td>6-60<\/td>\n<td>8-60<\/td>\n<td>10-60<\/td>\n<td>12-40<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Ch\u1ecdn l\u1ef1a d\u1ef1a tr\u00ean c\u00e1c h\u1ea1n ch\u1ebf v\u1ec1 kh\u00f4ng gian; ki\u1ec3m tra xem ch\u1ed7 l\u00f5m c\u00f3 t\u01b0\u01a1ng th\u00edch v\u1edbi tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n hay kh\u00f4ng.<\/p>\n<h2>Th\u00f4ng s\u1ed1 k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n cho GB9074.13<\/h2>\n<p>Ti\u00eau chu\u1ea9n GB9074.13 m\u00f4 t\u1ea3 chi ti\u1ebft c\u00e1c lo\u1ea1i v\u00edt k\u1ebft h\u1ee3p \u0111\u1ea7u l\u1ee5c gi\u00e1c ch\u00ecm v\u00e0 \u0111\u1ea7u ch\u1eef th\u1eadp, k\u1ebft h\u1ee3p gi\u1eefa \u0111\u1ea7u l\u1ee5c gi\u00e1c v\u00e0 \u0111\u1ea7u ch\u1eef th\u1eadp theo ti\u00eau chu\u1ea9n GB29.2. Chi\u1ec1u d\u00e0i t\u1eeb 6 mm \u0111\u1ebfn 50 mm, ph\u00f9 h\u1ee3p cho c\u00e1c c\u00f4ng vi\u1ec7c \u0111\u00f2i h\u1ecfi m\u00f4-men xo\u1eafn cao.<\/p>\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table style=\"width: 100%;\">\n<thead>\n<tr>\n<th colspan=\"2\">\u0110\u01b0\u1eddng k\u00ednh danh ngh\u0129a d<\/th>\n<th>M4<\/th>\n<th>M5<\/th>\n<th>M6<\/th>\n<th>M8<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td colspan=\"2\">Cao \u0111\u1ed9 p<\/td>\n<td>0.7<\/td>\n<td>0.8<\/td>\n<td>1<\/td>\n<td>1.25<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"3\">k<\/td>\n<td>Danh ngh\u0129a<\/td>\n<td>2.8<\/td>\n<td>3.5<\/td>\n<td>4<\/td>\n<td>5.3<\/td>\n<\/tr>\n<tr>\n<td>t\u1ed1i \u0111a<\/td>\n<td>3<\/td>\n<td>3.74<\/td>\n<td>4.24<\/td>\n<td>5.54<\/td>\n<\/tr>\n<tr>\n<td>ph\u00fat<\/td>\n<td>2.6<\/td>\n<td>3.26<\/td>\n<td>3.76<\/td>\n<td>5.06<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">dk<\/td>\n<td>t\u1ed1i \u0111a<\/td>\n<td>7<\/td>\n<td>8<\/td>\n<td>10<\/td>\n<td>13<\/td>\n<\/tr>\n<tr>\n<td>ph\u00fat<\/td>\n<td>6.64<\/td>\n<td>7.64<\/td>\n<td>9.64<\/td>\n<td>12.57<\/td>\n<\/tr>\n<tr>\n<td colspan=\"2\">Chi\u1ec1u d\u00e0i L<\/td>\n<td>6-40<\/td>\n<td>10-40<\/td>\n<td>10-50<\/td>\n<td>12-40<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Nh\u1eefng thi\u1ebft b\u1ecb n\u00e0y cung c\u1ea5p t\u00f9y ch\u1ecdn truy\u1ec1n \u0111\u1ed9ng k\u00e9p, t\u0103ng c\u01b0\u1eddng t\u00ednh linh ho\u1ea1t trong l\u1eafp \u0111\u1eb7t.<\/p>\n<h2>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt cho m\u00e1y gi\u1eb7t (GB9074.26, GB9074.24, GB97.4)<\/h2>\n<p>C\u00e1c lo\u1ea1i v\u00f2ng \u0111\u1ec7m l\u00e0 m\u1ed9t ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu: GB9074.26 d\u00e0nh cho v\u00f2ng \u0111\u1ec7m l\u00f2 xo, GB9074.24 d\u00e0nh cho v\u00f2ng \u0111\u1ec7m ph\u1eb3ng (m\u1eb7c \u0111\u1ecbnh), v\u00e0 GB97.4 cung c\u1ea5p c\u00e1c bi\u1ebfn th\u1ec3 theo lo\u1ea1t (nh\u1ecf, ti\u00eau chu\u1ea9n, l\u1edbn).<\/p>\n<h3>GB9074.26 V\u00f2ng \u0111\u1ec7m l\u00f2 xo<\/h3>\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table style=\"width: 100%;\">\n<thead>\n<tr>\n<th>K\u00edch c\u1ee1<\/th>\n<th colspan=\"2\">d<\/th>\n<th colspan=\"2\">S<\/th>\n<th colspan=\"2\">b<\/th>\n<th colspan=\"2\">h<\/th>\n<\/tr>\n<tr>\n<th><\/th>\n<th>ph\u00fat<\/th>\n<th>t\u1ed1i \u0111a<\/th>\n<th>ph\u00fat<\/th>\n<th>t\u1ed1i \u0111a<\/th>\n<th>ph\u00fat<\/th>\n<th>t\u1ed1i \u0111a<\/th>\n<th>ph\u00fat<\/th>\n<th>t\u1ed1i \u0111a<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>2.5<\/td>\n<td>2.2<\/td>\n<td>2.34<\/td>\n<td>0.52<\/td>\n<td>0.68<\/td>\n<td>0.9<\/td>\n<td>1.1<\/td>\n<td>1.2<\/td>\n<td>1.5<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>2.69<\/td>\n<td>2.83<\/td>\n<td>0.7<\/td>\n<td>0.9<\/td>\n<td>1.1<\/td>\n<td>1.3<\/td>\n<td>1.6<\/td>\n<td>2<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>3.6<\/td>\n<td>3.78<\/td>\n<td>1<\/td>\n<td>1.2<\/td>\n<td>1.4<\/td>\n<td>1.6<\/td>\n<td>2.2<\/td>\n<td>2.75<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>4.45<\/td>\n<td>4.75<\/td>\n<td>1.2<\/td>\n<td>1.4<\/td>\n<td>1.9<\/td>\n<td>2.1<\/td>\n<td>2.6<\/td>\n<td>3.25<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>5.41<\/td>\n<td>5.71<\/td>\n<td>1.5<\/td>\n<td>1.7<\/td>\n<td>2.35<\/td>\n<td>2.65<\/td>\n<td>3.2<\/td>\n<td>4<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>7.28<\/td>\n<td>7.64<\/td>\n<td>1.9<\/td>\n<td>2.1<\/td>\n<td>2.85<\/td>\n<td>3.15<\/td>\n<td>4<\/td>\n<td>5<\/td>\n<\/tr>\n<tr>\n<td>10<\/td>\n<td>9.23<\/td>\n<td>9.59<\/td>\n<td>2.35<\/td>\n<td>2.65<\/td>\n<td>3.3<\/td>\n<td>3.7<\/td>\n<td>5<\/td>\n<td>6.25<\/td>\n<\/tr>\n<tr>\n<td>12<\/td>\n<td>11.1<\/td>\n<td>11.53<\/td>\n<td>2.85<\/td>\n<td>3.15<\/td>\n<td>3.8<\/td>\n<td>4.2<\/td>\n<td>6<\/td>\n<td>7.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3>V\u00f2ng \u0111\u1ec7m ph\u1eb3ng GB9074.24<\/h3>\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table style=\"width: 100%;\">\n<thead>\n<tr>\n<th rowspan=\"3\">d<\/th>\n<th>Danh ngh\u0129a<\/th>\n<th>2.5<\/th>\n<th>3<\/th>\n<th>4<\/th>\n<th>5<\/th>\n<th>6<\/th>\n<th>8<\/th>\n<th>10<\/th>\n<th>12<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td rowspan=\"2\">\u0110\u01b0\u1eddng k\u00ednh trong<\/td>\n<td>t\u1ed1i \u0111a<\/td>\n<td>2.34<\/td>\n<td>2.83<\/td>\n<td>3.78<\/td>\n<td>4.75<\/td>\n<td>5.71<\/td>\n<td>7.64<\/td>\n<td>9.59<\/td>\n<td>11.53<\/td>\n<\/tr>\n<tr>\n<td>ph\u00fat<\/td>\n<td>2.24<\/td>\n<td>2.73<\/td>\n<td>3.66<\/td>\n<td>4.57<\/td>\n<td>5.53<\/td>\n<td>7.42<\/td>\n<td>9.37<\/td>\n<td>11.26<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\">\u0110\u01b0\u1eddng k\u00ednh ngo\u00e0i d1<\/td>\n<td>t\u1ed1i \u0111a<\/td>\n<td>6<\/td>\n<td>7<\/td>\n<td>9<\/td>\n<td>10<\/td>\n<td>12<\/td>\n<td>16<\/td>\n<td>20<\/td>\n<td>24<\/td>\n<\/tr>\n<tr>\n<td>ph\u00fat<\/td>\n<td>5.7<\/td>\n<td>6.64<\/td>\n<td>8.64<\/td>\n<td>9.64<\/td>\n<td>11.57<\/td>\n<td>15.57<\/td>\n<td>19.48<\/td>\n<td>23.48<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"3\">\u0110\u1ed9 d\u00e0y h<\/td>\n<td>Danh ngh\u0129a<\/td>\n<td>0.5<\/td>\n<td>0.5<\/td>\n<td>0.8<\/td>\n<td>1<\/td>\n<td>1.6<\/td>\n<td>2<\/td>\n<td>2.5<\/td>\n<td>3<\/td>\n<\/tr>\n<tr>\n<td>t\u1ed1i \u0111a<\/td>\n<td>0.55<\/td>\n<td>0.55<\/td>\n<td>0.9<\/td>\n<td>1.1<\/td>\n<td>1.8<\/td>\n<td>2.2<\/td>\n<td>2.7<\/td>\n<td>3.3<\/td>\n<\/tr>\n<tr>\n<td>ph\u00fat<\/td>\n<td>0.45<\/td>\n<td>0.45<\/td>\n<td>0.7<\/td>\n<td>0.9<\/td>\n<td>1.4<\/td>\n<td>1.8<\/td>\n<td>2.3<\/td>\n<td>2.7<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3>V\u00f2ng \u0111\u1ec7m ph\u1eb3ng GB97.4<\/h3>\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table style=\"width: 100%;\">\n<thead>\n<tr>\n<th rowspan=\"4\">Ch\u1ee7 \u0111\u1ec1 d<\/th>\n<th colspan=\"2\">Lo\u1ea1t phim nh\u1ecf<\/th>\n<th colspan=\"2\">D\u00f2ng ti\u00eau chu\u1ea9n<\/th>\n<th colspan=\"2\">D\u00f2ng s\u1ea3n ph\u1ea9m l\u1edbn<\/th>\n<\/tr>\n<tr>\n<th>h Danh ngh\u0129a<\/th>\n<th>d1 t\u1ed1i \u0111a<\/th>\n<th>h Danh ngh\u0129a<\/th>\n<th>d1 t\u1ed1i \u0111a<\/th>\n<th>h Danh ngh\u0129a<\/th>\n<th>d1 t\u1ed1i \u0111a<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>M2<\/td>\n<td>0.6<\/td>\n<td>4.5<\/td>\n<td>0.6<\/td>\n<td>5<\/td>\n<td>0.6<\/td>\n<td>6<\/td>\n<\/tr>\n<tr>\n<td>M2.5<\/td>\n<td>0.6<\/td>\n<td>5<\/td>\n<td>0.6<\/td>\n<td>6<\/td>\n<td>0.6<\/td>\n<td>8<\/td>\n<\/tr>\n<tr>\n<td>M3<\/td>\n<td>0.6<\/td>\n<td>6<\/td>\n<td>0.6<\/td>\n<td>7<\/td>\n<td>0.8<\/td>\n<td>9<\/td>\n<\/tr>\n<tr>\n<td>M3.5<\/td>\n<td>0.8<\/td>\n<td>7<\/td>\n<td>0.8<\/td>\n<td>8<\/td>\n<td>0.8<\/td>\n<td>11<\/td>\n<\/tr>\n<tr>\n<td>M4<\/td>\n<td>0.8<\/td>\n<td>8<\/td>\n<td>0.8<\/td>\n<td>9<\/td>\n<td>1<\/td>\n<td>12<\/td>\n<\/tr>\n<tr>\n<td>M5<\/td>\n<td>1<\/td>\n<td>9<\/td>\n<td>1<\/td>\n<td>10<\/td>\n<td>1<\/td>\n<td>15<\/td>\n<\/tr>\n<tr>\n<td>M6<\/td>\n<td>1.6<\/td>\n<td>11<\/td>\n<td>1.6<\/td>\n<td>12<\/td>\n<td>1.6<\/td>\n<td>18<\/td>\n<\/tr>\n<tr>\n<td>M8<\/td>\n<td>1.6<\/td>\n<td>15<\/td>\n<td>1.6<\/td>\n<td>16<\/td>\n<td>2<\/td>\n<td>24<\/td>\n<\/tr>\n<tr>\n<td>M10<\/td>\n<td>2<\/td>\n<td>18<\/td>\n<td>2<\/td>\n<td>20<\/td>\n<td>2.5<\/td>\n<td>30<\/td>\n<\/tr>\n<tr>\n<td>M12<\/td>\n<td>2<\/td>\n<td>20<\/td>\n<td>2.5<\/td>\n<td>24<\/td>\n<td>3<\/td>\n<td>37<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>H\u00e3y ch\u1ec9 \u0111\u1ecbnh d\u00f2ng s\u1ea3n ph\u1ea9m cho GB97.4; m\u1eb7c \u0111\u1ecbnh l\u00e0 GB9074.24 cho c\u00e1c \u1ee9ng d\u1ee5ng ti\u00eau chu\u1ea9n.<\/p>\n<h2>V\u1eadt li\u1ec7u v\u00e0 th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc<\/h2>\n<p>C\u00e1c v\u1eadt li\u1ec7u bao g\u1ed3m th\u00e9p kh\u00f4ng g\u1ec9 SUS304 v\u00e0 SUS316 \u0111\u1ec3 ch\u1ed1ng \u0103n m\u00f2n, v\u00e0 th\u00e9p carbon (1010, 1018, 10B21) \u0111\u1ec3 t\u0103ng \u0111\u1ed9 b\u1ec1n, v\u1edbi c\u00e1c m\u00e1c th\u00e9p 4.8 v\u00e0 8.8. Th\u00e9p carbon c\u1ea7n t\u00f4i c\u1ee9ng, kh\u1eed hydro v\u00e0 m\u1ea1, kh\u00f4ng gi\u1ed1ng nh\u01b0 th\u00e9p kh\u00f4ng g\u1ec9 ch\u1ec9 c\u1ea7n l\u00e0m s\u1ea1ch.<\/p>\n<div class=\"table-container\" style=\"overflow-x: auto; width: 100%;\">\n<table style=\"width: 100%;\">\n<thead>\n<tr>\n<th>V\u1eadt li\u1ec7u<\/th>\n<th>C (%)<\/th>\n<th>Mn (%)<\/th>\n<th>Si (%)<\/th>\n<th>P (%)<\/th>\n<th>S (%)<\/th>\n<th>Ni (%)<\/th>\n<th>Mo (%)<\/th>\n<th>Cr (%)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Th\u00e9p kh\u00f4ng g\u1ec9 SUS304<\/td>\n<td>\u22640,08<\/td>\n<td>\u22642,00<\/td>\n<td>\u22641,00<\/td>\n<td>\u22640,045<\/td>\n<td>\u22640,03<\/td>\n<td>8.00-11.00<\/td>\n<td>–<\/td>\n<td>17.00-19.00<\/td>\n<\/tr>\n<tr>\n<td>Th\u00e9p kh\u00f4ng g\u1ec9 SUS316<\/td>\n<td>\u22640,08<\/td>\n<td>\u22642,00<\/td>\n<td>\u22641,00<\/td>\n<td>\u22640,045<\/td>\n<td>\u22640,03<\/td>\n<td>10.00-14.00<\/td>\n<td>2.00-3.00<\/td>\n<td>16.00-18.00<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Th\u00e9p kh\u00f4ng g\u1ec9 SUS316 c\u00f3 \u01b0u \u0111i\u1ec3m v\u01b0\u1ee3t tr\u1ed9i trong m\u00f4i tr\u01b0\u1eddng bi\u1ec3n; th\u00e9p carbon ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c t\u00ecnh hu\u1ed1ng ch\u1ecbu t\u1ea3i tr\u1ecdng cao n\u1ebfu \u0111\u01b0\u1ee3c x\u1eed l\u00fd \u0111\u00fang c\u00e1ch.<\/p>\n<h2>\u0110\u1eb7c t\u00ednh hi\u1ec7u su\u1ea5t<\/h2>\n<p>\u1ed0c v\u00edt k\u1ebft h\u1ee3p b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 th\u01b0\u1eddng \u0111\u1ea1t ti\u00eau chu\u1ea9n A2-70 ho\u1eb7c A4-70, v\u1edbi \u0111\u1ed9 b\u1ec1n k\u00e9o kho\u1ea3ng 700 MPa v\u00e0 \u0111\u1ed9 b\u1ec1n ch\u1ea3y 450 MPa. C\u00e1c lo\u1ea1i b\u1eb1ng th\u00e9p carbon \u0111\u1ea1t 4.8 (\u0111\u1ed9 b\u1ec1n k\u00e9o 400 MPa) ho\u1eb7c 8.8 (\u0111\u1ed9 b\u1ec1n ch\u1ea3y 800 MPa). V\u00f2ng \u0111\u1ec7m l\u00f2 xo gi\u00fap kh\u00f3a ch\u1eb7t, ch\u1ed1ng rung theo c\u00e1c th\u1eed nghi\u1ec7m ti\u00eau chu\u1ea9n.<\/p>\n<h2>\u01afu \u0111i\u1ec3m v\u00e0 \u1ee9ng d\u1ee5ng<\/h2>\n<p>\u01afu \u0111i\u1ec3m bao g\u1ed3m l\u1eafp r\u00e1p s\u1eb5n \u0111\u1ec3 t\u0103ng hi\u1ec7u qu\u1ea3, ch\u1ed1ng l\u1ecfng l\u1ebbo v\u00e0 ch\u1ed1ng \u0103n m\u00f2n. \u1ee8ng d\u1ee5ng: GB9074.4\/8 trong l\u0129nh v\u1ef1c \u0111i\u1ec7n t\u1eed v\u00e0 truy\u1ec1n th\u00f4ng; GB9074.13 trong l\u0129nh v\u1ef1c \u0111\u01b0\u1eddng s\u1eaft, c\u1ea7u v\u00e0 x\u00e2y d\u1ef1ng cho c\u00e1c nhu c\u1ea7u v\u1ec1 \u0111\u1ed9 b\u1ec1n cao.<\/p>\n<h2>C\u00e1c y\u1ebfu t\u1ed1 c\u1ea7n xem x\u00e9t khi l\u1eafp \u0111\u1eb7t v\u00e0 s\u1ea3n xu\u1ea5t<\/h2>\n<p>L\u1eafp \u0111\u1eb7t b\u1eb1ng c\u00e1c d\u1ee5ng c\u1ee5 ph\u00f9 h\u1ee3p, \u0111\u1ea3m b\u1ea3o c\u00e1c v\u00f2ng \u0111\u1ec7m \u0111\u01b0\u1ee3c \u0111\u1eb7t \u0111\u00fang v\u1ecb tr\u00ed. \u0110\u1ed1i v\u1edbi th\u00e9p carbon, \u00e1p d\u1ee5ng s\u1ed1 l\u01b0\u1ee3ng \u0111\u1eb7t h\u00e0ng t\u1ed1i thi\u1ec3u do quy tr\u00ecnh s\u1ea3n xu\u1ea5t. Quy tr\u00ecnh s\u1ea3n xu\u1ea5t th\u00e9p kh\u00f4ng g\u1ec9 \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a, l\u00fd t\u01b0\u1edfng cho vi\u1ec7c giao h\u00e0ng nhanh ch\u00f3ng.<\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/h2>\n<div class=\"faq\">\n<p><q>\u0110i\u1ec3m kh\u00e1c bi\u1ec7t gi\u1eefa GB9074.4 v\u00e0 GB9074.8 l\u00e0 g\u00ec?<\/q>GB9074.4 c\u00f3 \u0111\u1ea7u l\u1edbn h\u01a1n, d\u00e0y h\u01a1n \u0111\u1ec3 ph\u00e2n b\u1ed5 t\u1ea3i tr\u1ecdng t\u1ed1t h\u01a1n; GB9074.8 c\u00f3 \u0111\u1ea7u nh\u1ecf h\u01a1n cho kh\u00f4ng gian ch\u1eadt h\u1eb9p, v\u1edbi k\u00edch th\u01b0\u1edbc r\u00e3nh kh\u00e1c nhau cho M5 (s\u1ed1 2 so v\u1edbi s\u1ed1 3).<\/p>\n<p><q>Khi n\u00e0o n\u00ean ch\u1ecdn SUS316 thay v\u00ec SUS304?<\/q><\/p>\n<p>N\u00ean ch\u1ecdn SUS316 trong m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n nh\u01b0 m\u00f4i tr\u01b0\u1eddng bi\u1ec3n ho\u1eb7c ti\u1ebfp x\u00fac v\u1edbi h\u00f3a ch\u1ea5t v\u00ec h\u00e0m l\u01b0\u1ee3ng molypden gi\u00fap t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n r\u1ed7.<\/p>\n<p><q>Chi\u1ec1u d\u00e0i c\u00f3 th\u1ec3 v\u01b0\u1ee3t qu\u00e1 ph\u1ea1m vi ti\u00eau chu\u1ea9n kh\u00f4ng?<\/q><\/p>\n<p>C\u00f3, chi\u1ec1u d\u00e0i t\u00f9y ch\u1ec9nh l\u00ean \u0111\u1ebfn 90 mm l\u00e0 c\u00f3 th\u1ec3, tuy nhi\u00ean chi\u1ec1u d\u00e0i ti\u00eau chu\u1ea9n l\u00e0 6-60 mm; vui l\u00f2ng n\u00eau r\u00f5 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng s\u1ea3n xu\u1ea5t.<\/p>\n<p><q>N\u00ean ch\u1ecdn d\u00f2ng m\u00e1y gi\u1eb7t n\u00e0o cho GB97.4?<\/q><\/p>\n<p>Ch\u1ecdn lo\u1ea1i nh\u1ecf cho kh\u00f4ng gian ch\u1eadt h\u1eb9p, lo\u1ea1i ti\u00eau chu\u1ea9n cho m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng th\u00f4ng th\u01b0\u1eddng, lo\u1ea1i l\u1edbn \u0111\u1ec3 ph\u00e2n b\u1ed5 t\u1ea3i tr\u1ecdng r\u1ed9ng; m\u1eb7c \u0111\u1ecbnh l\u00e0 GB9074.24 tr\u1eeb khi c\u00f3 quy \u0111\u1ecbnh kh\u00e1c.<\/p>\n<p><q>Quy tr\u00ecnh gia c\u00f4ng th\u00e9p cacbon kh\u00e1c v\u1edbi th\u00e9p kh\u00f4ng g\u1ec9 nh\u01b0 th\u1ebf n\u00e0o?<\/q><\/p>\n<p>Th\u00e9p cacbon c\u1ea7n t\u00f4i c\u1ee9ng, kh\u1eed hydro v\u00e0 m\u1ea1 \u0111\u1ec3 \u0111\u1ea1t \u0111\u1ed9 b\u1ec1n, trong khi th\u00e9p kh\u00f4ng g\u1ec9 ch\u1ec9 c\u1ea7n l\u00e0m s\u1ea1ch, gi\u00fap qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t \u0111\u01a1n gi\u1ea3n v\u00e0 nhanh ch\u00f3ng h\u01a1n.<\/p>\n<p><q>Nh\u1eefng lo\u1ea1i \u1ed1c v\u00edt n\u00e0y c\u00f3 ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 \u0111\u1ed9 rung cao kh\u00f4ng?<\/q><\/p>\n<p>\u0110\u00fang v\u1eady, v\u00f2ng \u0111\u1ec7m l\u00f2 xo t\u00edch h\u1ee3p gi\u00fap kh\u00f3a ch\u1eafc ch\u1eafn; th\u1eed nghi\u1ec7m theo ti\u00eau chu\u1ea9n cho c\u00e1c bi\u00ean d\u1ea1ng rung \u0111\u1ed9ng c\u1ee5 th\u1ec3.<\/p>\n<\/div>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Introduction to Combination Screws Combination screws, as defined in the GB 9074 series, are integrated fastening assemblies consisting of a screw, spring washer, and flat washer. These standards ensure uniformity in design, dimensions, and performance for reliable use in mechanical and electrical applications. GB9074.4 covers cross recessed pan head screws with washers, GB9074.8 addresses cross [&hellip;]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[220],"tags":[],"class_list":["post-5854","post","type-post","status-publish","format-standard","hentry","category-technical-documentation-and-references"],"_links":{"self":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5854","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/comments?post=5854"}],"version-history":[{"count":2,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5854\/revisions"}],"predecessor-version":[{"id":5856,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/posts\/5854\/revisions\/5856"}],"wp:attachment":[{"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/media?parent=5854"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/categories?post=5854"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/korea-transmission.com\/vi\/wp-json\/wp\/v2\/tags?post=5854"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}