{"id":5281,"date":"2025-07-21T09:00:48","date_gmt":"2025-07-21T02:00:48","guid":{"rendered":"https:\/\/mayxaydunghanoi.com\/?p=5281"},"modified":"2025-12-13T03:17:57","modified_gmt":"2025-12-12T20:17:57","slug":"tu-van-chon-mo-boi-tron-chuyen-dung-cho-bua-dap-da","status":"publish","type":"post","link":"https:\/\/mayxaydunghanoi.com\/vi\/tu-van-chon-mo-boi-tron-chuyen-dung-cho-bua-dap-da\/","title":{"rendered":"T\u01b0 v\u1ea5n ch\u1ecdn m\u1ee1 b\u00f4i tr\u01a1n chuy\u00ean d\u1ee5ng cho b\u00faa \u0111\u1eadp \u0111\u00e1"},"content":{"rendered":"<h2>Ch\u1ecdn \u0111\u00fang lo\u1ea1i m\u1ee1 b\u00f4i tr\u01a1n gi\u00fap t\u0103ng tu\u1ed5i th\u1ecd b\u00faa \u0111\u1eadp \u0111\u00e1, gi\u1ea3m hao m\u00f2n v\u00e0 t\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t ph\u00e1 \u0111\u00e1 trong c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng.<\/h2>\n<hr \/>\n<p>B\u00faa \u0111\u1eadp \u0111\u00e1 l\u00e0 thi\u1ebft b\u1ecb ch\u1ecbu t\u1ea3i n\u1eb7ng, ho\u1ea1t \u0111\u1ed9ng v\u1edbi l\u1ef1c va \u0111\u1eadp m\u1ea1nh v\u00e0 li\u00ean t\u1ee5c trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t. \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh, m\u1ee1 b\u00f4i tr\u01a1n chuy\u00ean d\u1ee5ng \u0111\u00f3ng vai tr\u00f2 kh\u00f4ng th\u1ec3 thay th\u1ebf. Tuy nhi\u00ean, tr\u00ean th\u1ecb tr\u01b0\u1eddng hi\u1ec7n c\u00f3 nhi\u1ec1u lo\u1ea1i m\u1ee1 v\u1edbi th\u00f4ng s\u1ed1 v\u00e0 th\u01b0\u01a1ng hi\u1ec7u kh\u00e1c nhau, khi\u1ebfn kh\u00f4ng \u00edt k\u1ef9 s\u01b0 v\u00e0 th\u1ee3 m\u00e1y b\u0103n kho\u0103n trong vi\u1ec7c l\u1ef1a ch\u1ecdn.<\/p>\n<p>Trong b\u00e0i vi\u1ebft n\u00e0y, Hanoi Vietnam s\u1ebd ph\u00e2n t\u00edch s\u00e2u c\u00e1c ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt khi ch\u1ecdn m\u1ee1 b\u00f4i tr\u01a1n, \u0111\u1eb7c \u0111i\u1ec3m m\u1ee1 ch\u1ecbu nhi\u1ec7t \u2013 ch\u1ecbu l\u1ef1c cao, c\u0169ng nh\u01b0 khuy\u1ebfn ngh\u1ecb th\u1ef1c t\u1ebf theo t\u1eebng d\u00f2ng b\u00faa \u0111\u1eadp \u0111\u00e1, t\u1eeb \u0111\u00f3 gi\u00fap k\u1ef9 s\u01b0 v\u00e0 ch\u1ee7 \u0111\u1ea7u t\u01b0 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh \u0111\u00fang \u0111\u1eafn.<\/p>\n<hr \/>\n<h3>V\u00ec sao c\u1ea7n d\u00f9ng m\u1ee1 b\u00f4i tr\u01a1n chuy\u00ean d\u1ee5ng cho b\u00faa \u0111\u1eadp \u0111\u00e1?<\/h3>\n<p>B\u00faa \u0111\u1eadp \u0111\u00e1 (hydraulic breaker) ho\u1ea1t \u0111\u1ed9ng v\u1edbi c\u01a1 c\u1ea5u piston t\u00e1c \u0111\u1ed9ng l\u00ean \u0111\u1ee5c (tool) v\u1edbi t\u1ed1c \u0111\u1ed9 va \u0111\u1eadp cao v\u00e0 \u00e1p su\u1ea5t l\u1edbn. Trong qu\u00e1 tr\u00ecnh l\u00e0m vi\u1ec7c, c\u00e1c chi ti\u1ebft tr\u01b0\u1ee3t \u2013 \u0111\u1eb7c bi\u1ec7t l\u00e0 gi\u1eefa \u0111\u1ee5c v\u00e0 \u1ed1ng d\u1eabn \u2013 ph\u00e1t sinh ma s\u00e1t l\u1edbn v\u00e0 sinh nhi\u1ec7t c\u1ef1c cao. N\u1ebfu kh\u00f4ng c\u00f3 l\u1edbp m\u1ee1 b\u00f4i tr\u01a1n chuy\u00ean d\u1ee5ng, c\u00e1c chi ti\u1ebft s\u1ebd nhanh ch\u00f3ng m\u00e0i m\u00f2n, g\u00e2y k\u1eb9t b\u00faa ho\u1eb7c g\u00e3y tool.<\/p>\n<p>Ngo\u00e0i ra, b\u1ee5i \u0111\u00e1, n\u01b0\u1edbc v\u00e0 rung ch\u1ea5n c\u0169ng d\u1ec5 l\u00e0m tr\u00f4i m\u1ea5t l\u1edbp m\u1ee1 th\u00f4ng th\u01b0\u1eddng. Do \u0111\u00f3, c\u1ea7n d\u00f9ng <strong>m\u1ee1 b\u00f4i tr\u01a1n \u0111\u1eb7c ch\u1ee7ng<\/strong>, c\u00f3 kh\u1ea3 n\u0103ng:<\/p>\n<ul>\n<li><strong>Ch\u1ecbu nhi\u1ec7t cao<\/strong>: \u00edt nh\u1ea5t 200\u2013250\u00b0C<\/li>\n<li><strong>B\u00e1m d\u00ednh t\u1ed1t<\/strong>: kh\u00f4ng b\u1ecb v\u0103ng kh\u1ecfi v\u1ecb tr\u00ed ma s\u00e1t<\/li>\n<li><strong>Ch\u1ecbu \u00e1p l\u1ef1c c\u1ef1c l\u1edbn (EP)<\/strong>: ch\u1ed1ng m\u00e0i m\u00f2n, b\u1ea3o v\u1ec7 t\u1ed1t m\u1eb7t ti\u1ebfp x\u00fac<\/li>\n<li><strong>Ch\u1ed1ng r\u1eeda tr\u00f4i b\u1edfi n\u01b0\u1edbc ho\u1eb7c b\u1ee5i m\u1ecbn<\/strong><\/li>\n<\/ul>\n<hr \/>\n<h3>Ti\u00eau ch\u00ed ch\u1ecdn m\u1ee1 b\u00f4i tr\u01a1n \u0111\u00fang chu\u1ea9n k\u1ef9 thu\u1eadt<\/h3>\n<p>\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u qu\u1ea3 l\u00e2u d\u00e0i cho b\u00faa \u0111\u1eadp \u0111\u00e1, k\u1ef9 s\u01b0 c\u1ea7n c\u0103n c\u1ee9 v\u00e0o c\u00e1c ti\u00eau ch\u00ed sau khi l\u1ef1a ch\u1ecdn m\u1ee1:<\/p>\n<p><strong>1. \u0110\u1ed9 \u0111\u1eb7c (NLGI Grade):<\/strong><br \/>\nTh\u00f4ng th\u01b0\u1eddng n\u00ean ch\u1ecdn m\u1ee1 lo\u1ea1i NLGI 2 ho\u1eb7c NLGI 1.5 \u2013 \u0111\u1ea3m b\u1ea3o \u0111\u1ee7 \u0111\u1ed9 \u0111\u1eb7c \u0111\u1ec3 b\u00e1m tr\u00ean b\u1ec1 m\u1eb7t kim lo\u1ea1i, kh\u00f4ng ch\u1ea3y nh\u1ecf gi\u1ecdt khi nhi\u1ec7t t\u0103ng.<\/p>\n<p><strong>2. Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t (Dropping Point):<\/strong><br \/>\nL\u00fd t\u01b0\u1edfng l\u00e0 t\u1eeb <strong>250\u00b0C tr\u1edf l\u00ean<\/strong>, nh\u1eb1m tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng ch\u1ea3y l\u1ecfng, m\u1ea5t t\u00e1c d\u1ee5ng b\u00f4i tr\u01a1n khi b\u00faa l\u00e0m vi\u1ec7c li\u00ean t\u1ee5c trong th\u1eddi gian d\u00e0i.<\/p>\n<p><strong>3. Ph\u1ee5 gia EP (Extreme Pressure):<\/strong><br \/>\nM\u1ee1 b\u00faa c\u1ea7n ch\u1ee9a <strong>ph\u1ee5 gia ch\u1ed1ng m\u00e0i m\u00f2n v\u00e0 ch\u1ecbu \u00e1p cao<\/strong>, nh\u01b0 MoS\u2082 (Molybdenum disulfide), Graphite ho\u1eb7c Calcium sulfonate complex. Nh\u1eefng ph\u1ee5 gia n\u00e0y t\u1ea1o l\u1edbp m\u00e0ng b\u1ea3o v\u1ec7 khi c\u00f3 va \u0111\u1eadp m\u1ea1nh.<\/p>\n<p><strong>4. Kh\u1ea3 n\u0103ng ch\u1ed1ng n\u01b0\u1edbc v\u00e0 ch\u1ed1ng r\u1eeda tr\u00f4i:<\/strong><br \/>\nDo l\u00e0m vi\u1ec7c ngo\u00e0i tr\u1eddi, b\u00faa \u0111\u1eadp d\u1ec5 b\u1ecb r\u1eeda tr\u00f4i m\u1ee1 n\u1ebfu d\u00f9ng lo\u1ea1i kh\u00f4ng chuy\u00ean d\u1ee5ng. M\u1ee1 c\u1ea7n c\u00f3 kh\u1ea3 n\u0103ng <strong>ch\u1ecbu \u1ea9m v\u00e0 gi\u1eef b\u00e1m l\u00e2u d\u00e0i tr\u00ean \u0111\u1ee5c<\/strong>.<\/p>\n<p><strong>5. Kh\u1ea3 n\u0103ng ch\u1ecbu rung v\u00e0 s\u1ed1c c\u01a1 h\u1ecdc:<\/strong><br \/>\nM\u1ee1 kh\u00f4ng ch\u1ec9 b\u00f4i tr\u01a1n m\u00e0 c\u00f2n h\u1ea5p th\u1ee5 rung \u0111\u1ed9ng, gi\u1ea3m ti\u1ebfng \u1ed3n v\u00e0 b\u1ea3o v\u1ec7 piston \u2013 tool kh\u1ecfi s\u1ed1c c\u01a1 h\u1ecdc.<\/p>\n<hr \/>\n<h3>C\u00e1c lo\u1ea1i m\u1ee1 b\u00f4i tr\u01a1n chuy\u00ean d\u1ee5ng ph\u1ed5 bi\u1ebfn cho b\u00faa \u0111\u1eadp \u0111\u00e1<\/h3>\n<p>Hi\u1ec7n nay, m\u1ed9t s\u1ed1 d\u00f2ng m\u1ee1 chuy\u00ean d\u00f9ng cho b\u00faa \u0111\u1eadp \u0111\u00e1 \u0111\u01b0\u1ee3c k\u1ef9 s\u01b0 c\u00f4ng tr\u00ecnh tin d\u00f9ng:<\/p>\n<table>\n<thead>\n<tr>\n<th>T\u00ean s\u1ea3n ph\u1ea9m<\/th>\n<th>Th\u00e0nh ph\u1ea7n ch\u00ednh<\/th>\n<th>\u0110i\u1ec3m r\u01a1i (\u00b0C)<\/th>\n<th>\u01afu \u0111i\u1ec3m n\u1ed5i b\u1eadt<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Shell Gadus S5 V460D 2<\/strong><\/td>\n<td>Molybdenum (MoS\u2082)<\/td>\n<td>&gt;280\u00b0C<\/td>\n<td>B\u00e1m d\u00ednh t\u1ed1t, ch\u1ecbu va \u0111\u1eadp m\u1ea1nh, EP cao<\/td>\n<\/tr>\n<tr>\n<td><strong>Kl\u00fcberlub BE 41-1501<\/strong><\/td>\n<td>Graphite + MoS\u2082<\/td>\n<td>&gt;250\u00b0C<\/td>\n<td>D\u00f9ng cho m\u00e1y khai th\u00e1c, rung cao<\/td>\n<\/tr>\n<tr>\n<td><strong>Mobilgrease XHP 462 M<\/strong><\/td>\n<td>Lithium complex + MoS\u2082<\/td>\n<td>&gt;270\u00b0C<\/td>\n<td>Kh\u00e1ng n\u01b0\u1edbc, ch\u1ecbu l\u1ef1c, \u1ee9ng d\u1ee5ng \u0111a n\u0103ng<\/td>\n<\/tr>\n<tr>\n<td><strong>OKS 478<\/strong><\/td>\n<td>MoS\u2082 + ph\u1ee5 gia ch\u1ecbu m\u00e0i<\/td>\n<td>&gt;260\u00b0C<\/td>\n<td>D\u00f9ng cho thi\u1ebft b\u1ecb c\u01a1 kh\u00ed \u2013 th\u1ee7y l\u1ef1c n\u1eb7ng<\/td>\n<\/tr>\n<tr>\n<td><strong>BESOL Heavy Grease<\/strong><\/td>\n<td>Calcium sulfonate<\/td>\n<td>~280\u00b0C<\/td>\n<td>R\u1ea5t b\u1ec1n, b\u00e1m d\u00ednh c\u1ef1c t\u1ed1t, \u00edt b\u1ecb r\u1eeda tr\u00f4i<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h3>H\u01b0\u1edbng d\u1eabn tra m\u1ee1 \u0111\u00fang c\u00e1ch \u0111\u1ec3 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd b\u00faa \u0111\u1eadp<\/h3>\n<p>Ngay c\u1ea3 khi ch\u1ecdn \u0111\u00fang lo\u1ea1i m\u1ee1, vi\u1ec7c <strong>tra m\u1ee1 \u0111\u00fang li\u1ec1u l\u01b0\u1ee3ng v\u00e0 \u0111\u00fang t\u1ea7n su\u1ea5t<\/strong> c\u0169ng \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn hi\u1ec7u su\u1ea5t l\u00e0m vi\u1ec7c:<\/p>\n<ul>\n<li><strong>Tra m\u1ee1 tr\u01b0\u1edbc m\u1ed7i ca l\u00e0m vi\u1ec7c<\/strong>, \u0111\u1eb7c bi\u1ec7t n\u1ebfu l\u00e0m \u1edf m\u00f4i tr\u01b0\u1eddng b\u1ee5i \u1ea9m.<\/li>\n<li><strong>D\u00f9ng s\u00fang b\u01a1m m\u1ee1 \u00e1p l\u1ef1c cao<\/strong> \u0111\u1ec3 m\u1ee1 \u0111i s\u00e2u v\u00e0o v\u00f9ng ti\u1ebfp x\u00fac gi\u1eefa \u0111\u1ee5c v\u00e0 \u1ed1ng b\u00faa.<\/li>\n<li><strong>Kh\u00f4ng d\u00f9ng m\u1ee1 th\u1eeba\/\u0111\u00e3 c\u0169<\/strong>, v\u00ec b\u1ee5i m\u1ecbn b\u00e1m s\u1ebd bi\u1ebfn n\u00f3 th\u00e0nh \u201cch\u1ea5t m\u00e0i m\u00f2n ng\u01b0\u1ee3c\u201d.<\/li>\n<li>Sau kho\u1ea3ng <strong>4\u20136h l\u00e0m vi\u1ec7c li\u00ean t\u1ee5c<\/strong>, n\u00ean tra l\u1ea1i m\u1ee1 n\u1ebfu b\u00faa ho\u1ea1t \u0111\u1ed9ng trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<\/li>\n<li>\u0110\u1ea3m b\u1ea3o <strong>v\u1ec7 sinh s\u1ea1ch tool<\/strong> v\u00e0 v\u00f9ng ti\u1ebfp x\u00fac tr\u01b0\u1edbc khi tra m\u1ee1 m\u1edbi.<\/li>\n<\/ul>\n<hr \/>\n<h3>Kinh nghi\u1ec7m th\u1ef1c t\u1ebf t\u1eeb c\u00f4ng tr\u01b0\u1eddng<\/h3>\n<p>T\u1ea1i m\u1ed9t s\u1ed1 c\u00f4ng tr\u00ecnh \u0111\u00e0o m\u00f3ng v\u00e0 ph\u00e1 \u0111\u00e1 n\u1ec1n c\u1ee9ng \u1edf mi\u1ec1n Trung, \u0111\u1ed9i thi c\u00f4ng t\u1eebng g\u1eb7p t\u00ecnh tr\u1ea1ng b\u00faa \u0111\u1eadp <strong>g\u00e3y \u0111\u1ee5c sau 2 tu\u1ea7n<\/strong> d\u00f9 m\u00e1y c\u00f2n m\u1edbi. Nguy\u00ean nh\u00e2n do d\u00f9ng m\u1ee1 c\u00f4ng nghi\u1ec7p th\u00f4ng th\u01b0\u1eddng, kh\u00f4ng b\u00e1m \u0111\u01b0\u1ee3c tr\u00ean \u0111\u1ee5c khi b\u00faa v\u1eadn h\u00e0nh li\u00ean t\u1ee5c 6\u20138h\/ng\u00e0y.<\/p>\n<p>Sau khi chuy\u1ec3n sang lo\u1ea1i m\u1ee1 c\u00f3 ch\u1ee9a MoS\u2082 chuy\u00ean d\u1ee5ng (Shell Gadus S5 ho\u1eb7c OKS 478), t\u00ecnh tr\u1ea1ng tr\u00ean kh\u00f4ng c\u00f2n t\u00e1i di\u1ec5n. Tu\u1ed5i th\u1ecd \u0111\u1ee5c t\u0103ng \u0111\u00e1ng k\u1ec3, l\u01b0\u1ee3ng ti\u00eau hao m\u1ee1 gi\u1ea3m, \u0111\u1eb7c bi\u1ec7t m\u00e1y ch\u1ea1y \u201c\u00eam h\u01a1n\u201d r\u00f5 r\u1ec7t.<\/p>\n<hr \/>\n<h3><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>M\u1ee1 b\u00f4i tr\u01a1n chuy\u00ean d\u1ee5ng l\u00e0 <strong>y\u1ebfu t\u1ed1 b\u1eaft bu\u1ed9c<\/strong> khi v\u1eadn h\u00e0nh b\u00faa \u0111\u1eadp \u0111\u00e1 trong c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng.<\/li>\n<li>C\u1ea7n ch\u1ecdn m\u1ee1 c\u00f3 <strong>ch\u1ec9 s\u1ed1 ch\u1ecbu nhi\u1ec7t \u2013 ch\u1ecbu l\u1ef1c \u2013 ch\u1ed1ng n\u01b0\u1edbc \u2013 b\u00e1m d\u00ednh cao<\/strong>.<\/li>\n<li>\u01afu ti\u00ean m\u1ee1 ch\u1ee9a MoS\u2082, Graphite ho\u1eb7c ph\u1ee5 gia calcium sulfonate \u0111\u1ec3 t\u0103ng hi\u1ec7u qu\u1ea3 b\u00f4i tr\u01a1n.<\/li>\n<li>Tra m\u1ee1 \u0111\u1ecbnh k\u1ef3, \u0111\u00fang k\u1ef9 thu\u1eadt \u0111\u1ec3 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd \u0111\u1ee5c v\u00e0 piston, gi\u1ea3m thi\u1ec3u s\u1ef1 c\u1ed1 h\u01b0 h\u1ecfng.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Ch\u1ecdn \u0111\u00fang lo\u1ea1i m\u1ee1 b\u00f4i tr\u01a1n gi\u00fap t\u0103ng tu\u1ed5i th\u1ecd b\u00faa \u0111\u1eadp \u0111\u00e1, gi\u1ea3m hao m\u00f2n v\u00e0 t\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t ph\u00e1 \u0111\u00e1 trong c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng. B\u00faa \u0111\u1eadp \u0111\u00e1 l\u00e0 thi\u1ebft b\u1ecb ch\u1ecbu t\u1ea3i n\u1eb7ng, ho\u1ea1t \u0111\u1ed9ng v\u1edbi l\u1ef1c va \u0111\u1eadp m\u1ea1nh v\u00e0 li\u00ean t\u1ee5c trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t. \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh, m\u1ee1 b\u00f4i tr\u01a1n chuy\u00ean d\u1ee5ng \u0111\u00f3ng vai tr\u00f2 kh\u00f4ng&#8230;<\/p>\n","protected":false},"author":1,"featured_media":4749,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-5281","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v26.6) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>T\u01b0 v\u1ea5n ch\u1ecdn m\u1ee1 b\u00f4i tr\u01a1n chuy\u00ean d\u1ee5ng cho b\u00faa \u0111\u1eadp \u0111\u00e1 - Hanoi Vietnam Co., Ltd<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mayxaydunghanoi.com\/vi\/tu-van-chon-mo-boi-tron-chuyen-dung-cho-bua-dap-da\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"T\u01b0 v\u1ea5n ch\u1ecdn m\u1ee1 b\u00f4i tr\u01a1n chuy\u00ean d\u1ee5ng cho b\u00faa \u0111\u1eadp \u0111\u00e1\" \/>\n<meta property=\"og:description\" content=\"Ch\u1ecdn \u0111\u00fang lo\u1ea1i m\u1ee1 b\u00f4i tr\u01a1n gi\u00fap t\u0103ng tu\u1ed5i th\u1ecd b\u00faa \u0111\u1eadp \u0111\u00e1, gi\u1ea3m hao m\u00f2n v\u00e0 t\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t ph\u00e1 \u0111\u00e1 trong c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng. 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