{"id":3086,"date":"2026-10-09T01:46:26","date_gmt":"2026-10-09T01:46:26","guid":{"rendered":"https:\/\/yocl.com\/?wpr2_import=a5ef0c7a9e4d5b8c5e7f1b51c0deb236e00b0d53f4d782eaf8a79d0afa2eae66"},"modified":"2026-10-09T01:46:26","modified_gmt":"2026-10-09T01:46:26","slug":"pin-vs-fork-comb-busbars","status":"publish","type":"post","link":"https:\/\/yocl.com\/vi\/pin-vs-fork-comb-busbars\/","title":{"rendered":"Thanh n\u1ed1i Pin v\u00e0 Fork: H\u00ecnh d\u1ea1ng \u0111\u1ea7u cu\u1ed1i v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch"},"content":{"rendered":"

Ch\u1ecdn thanh n\u1ed1i d\u1ea1ng ch\u00e2n pin ho\u1eb7c d\u1ea1ng k\u1eb9p ch\u1eef U d\u1ef1a tr\u00ean giao di\u1ec7n cho ph\u00e9p c\u1ee7a \u0111\u1ea7u cu\u1ed1i nh\u1eadn v\u00e0 v\u1ecb tr\u00ed k\u1ebft n\u1ed1i<\/strong>. D\u1ea1ng ch\u00e2n pin c\u1ea7n c\u00f3 h\u00ecnh d\u1ea1ng l\u1ed1i v\u00e0o v\u00e0 gi\u1eef \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh; d\u1ea1ng k\u1eb9p ch\u1eef U h\u1edf c\u1ea7n c\u00f3 k\u1eb9p \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 kh\u1edbp v\u1edbi c\u00e1c nh\u00e1nh c\u1ee7a n\u00f3. C\u1ea3 hai ph\u1ea3i kh\u1edbp v\u1edbi k\u00edch th\u01b0\u1edbc ti\u1ebfp \u0111i\u1ec3m, kho\u1ea3ng c\u00e1ch h\u00e0ng v\u00e0 b\u1ed1 c\u1ee5c m\u1ea1ch. Kh\u00f4ng c\u00f3 h\u00ecnh d\u1ea1ng n\u00e0o cung c\u1ea5p kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch ph\u1ed5 qu\u00e1t ho\u1eb7c l\u1ee3i th\u1ebf hi\u1ec7u su\u1ea5t ph\u1ed5 qu\u00e1t.<\/p>\n

So s\u00e1nh h\u1eefu \u00edch gi\u1eef nguy\u00ean ki\u1ec3u m\u00e1y thi\u1ebft b\u1ecb, v\u1ecb tr\u00ed \u0111\u1ea7u cu\u1ed1i, h\u00e0ng v\u00e0 ch\u1ebf \u0111\u1ed9 l\u00e0m vi\u1ec7c \u0111i\u1ec7n, sau \u0111\u00f3 thay \u0111\u1ed5i thanh n\u1ed1i \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t. N\u00f3 tr\u1ea3 l\u1eddi hai c\u00e2u h\u1ecfi ri\u00eang bi\u1ec7t: ti\u1ebfp \u0111i\u1ec3m n\u00e0y c\u00f3 kh\u1edbp v\u1edbi giao di\u1ec7n kh\u00f4ng v\u00e0 s\u1ef1 k\u1ebft h\u1ee3p ho\u00e0n ch\u1ec9nh n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c ghi nh\u1eadn \u0111\u1ec3 s\u1eed d\u1ee5ng ch\u01b0a?<\/strong><\/p>\n

H\u00ecnh d\u1ea1ng ch\u00e2n pin v\u00e0 k\u1eb9p ch\u1eef U: \u0110\u1ea7u cu\u1ed1i c\u1ea7n kh\u1edbp v\u1edbi c\u00e1i g\u00ec<\/h2>\n

\u201cCh\u00e2n pin\u201d kh\u00f4ng nh\u1ea5t thi\u1ebft c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t thanh tr\u00f2n. Ph\u1ea7n b\u00ean ngo\u00e0i \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 c\u1ee7a YOCL BS101 ch\u00e2n c\u1eafm<\/a> cho th\u1ea5y c\u00e1c ti\u1ebfp \u0111i\u1ec3m h\u1eb9p, ph\u1eb3ng nh\u00f4 ra. D\u1ea1ng k\u1eb9p ch\u1eef U h\u1edf c\u00f3 hai nh\u00e1nh \u0111\u01b0\u1ee3c ng\u0103n c\u00e1ch b\u1edfi m\u1ed9t khe h\u1edf; d\u1ea1ng BS301 d\u00f2ng ch\u1eef U<\/a> minh h\u1ecda h\u1ed3 s\u01a1 m\u1edf \u0111\u00f3.<\/p>\n

T\u00ean danh m\u1ee5c c\u1ea7n c\u1ea9n th\u1eadn. YOCL \u0111\u1eb7t t\u00ean ri\u00eang BS201 nh\u01b0 m\u1ed9t C45 ch\u1ea1c<\/a>, m\u1eb7c d\u00f9 h\u00ecnh \u1ea3nh c\u1ee7a n\u00f3 cho th\u1ea5y c\u00e1c tab \u0111\u00f3ng r\u1ed9ng h\u01a1n. Gi\u1eef nguy\u00ean t\u00ean d\u00f2ng v\u00e0 so s\u00e1nh b\u1ea3n v\u1ebd c\u1ee7a n\u00f3; t\u1eeb \u201cch\u1ea1c\u201d m\u1ed9t m\u00ecnh kh\u00f4ng ch\u1ee9ng minh m\u1ed9t ti\u1ebfp \u0111i\u1ec3m h\u00ecnh ch\u1eef U m\u1edf.<\/p>\n

\u0110\u1ed1i v\u1edbi c\u1ea3 hai h\u1ed3 s\u01a1, vi\u1ec7c \u0111\u01b0a \u0111\u1ea7u cu\u1ed1i v\u00e0o ch\u1ec9 l\u00e0 m\u1ed9t ki\u1ec3m tra \u0111\u1ea7u v\u00e0o. C\u00e1c b\u1ec1 m\u1eb7t d\u1eabn \u0111i\u1ec7n d\u1ef1 \u0111\u1ecbnh ph\u1ea3i \u0111\u1ea1t \u0111\u1ebfn khu v\u1ef1c k\u1eb9p \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh \u1edf \u0111\u1ed9 s\u00e2u k\u1ebft n\u1ed1i y\u00eau c\u1ea7u. M\u1ed9t con v\u00edt c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y kh\u00f4ng th\u1ec3 ti\u1ebft l\u1ed9 m\u1ecdi t\u00ednh n\u0103ng c\u1ee7a \u0111\u1ea7u cu\u1ed1i ph\u00eda sau n\u00f3. \u0110\u1eebng gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng m\u1ed9t ch\u1ea1c s\u1ebd bao quanh b\u1ea5t k\u1ef3 con v\u00edt n\u00e0o, ho\u1eb7c m\u1ed9t l\u1ed7 d\u00e2y ch\u1ea5p nh\u1eadn m\u1ed9t ch\u1ed1t ph\u1eb3ng.<\/p>\n

T\u1ef7 l\u1ec7 t\u1ed5ng quan thanh c\u00e1i k\u1ebft h\u1ee3p<\/a> gi\u1ea3i th\u00edch c\u00e1c vai tr\u00f2 ri\u00eang bi\u1ec7t c\u1ee7a ti\u1ebfp \u0111i\u1ec3m, c\u1ef1c v\u00e0 m\u00f4-\u0111un. \u1ede \u0111\u00e2y, quy\u1ebft \u0111\u1ecbnh l\u00e0 ti\u1ebfp \u0111i\u1ec3m n\u00e0o c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i v\u1edbi c\u00f9ng m\u1ed9t giao di\u1ec7n thi\u1ebft b\u1ecb nh\u1eadn.<\/p>\n

So s\u00e1nh c\u1ea3 hai \u1ee9ng c\u1eed vi\u00ean v\u1edbi m\u1ed9t b\u1ea3n ghi \u0111\u1ea7u cu\u1ed1i<\/h2>\n

S\u1eed d\u1ee5ng h\u01b0\u1edbng d\u1eabn thi\u1ebft b\u1ecb ch\u00ednh x\u00e1c v\u00e0 s\u01a1 \u0111\u1ed3 \u0111\u1ea5u cu\u1ed1i, bao g\u1ed3m c\u1ea3 m\u1eb7t k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t. \u201c\u1ee8ng vi\u00ean\u201d b\u00ean d\u01b0\u1edbi c\u00f3 ngh\u0129a l\u00e0 ki\u1ec3m tra giao di\u1ec7n h\u1ed7 tr\u1ee3 \u0111\u00e1nh gi\u00e1 th\u00eam; \u0111\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 ph\u00ea duy\u1ec7t l\u1eafp r\u00e1p.<\/p>\n\n\n\n\n\n\n\n\n\n
B\u1eb1ng ch\u1ee9ng t\u1ea1i c\u00f9ng m\u1ed9t v\u1ecb tr\u00ed \u0111\u1ea5u cu\u1ed1i<\/th>\n\u1ee8ng vi\u00ean ch\u00e2n<\/th>\n\u1ee8ng vi\u00ean c\u00e0ng m\u1edf<\/th>\nRanh gi\u1edbi quy\u1ebft \u0111\u1ecbnh<\/th>\n<\/tr>\n<\/thead>\n
Ch\u1ec9 cho ph\u00e9p giao di\u1ec7n ch\u00e2n \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t; k\u00edch th\u01b0\u1edbc v\u00e0 s\u1ef1 \u0103n kh\u1edbp c\u1ee7a n\u00f3 \u0111\u1ed3ng \u00fd<\/td>\nGi\u1eef l\u1ea1i<\/td>\nLo\u1ea1i tr\u1eeb t\u1ea1i v\u1ecb tr\u00ed n\u00e0y<\/td>\nHo\u00e0n th\u00e0nh c\u00e1c ki\u1ec3m tra k\u1ebft h\u1ee3p c\u00f2n l\u1ea1i<\/td>\n<\/tr>\n
Ch\u1ec9 cho ph\u00e9p giao di\u1ec7n ch\u1ebb h\u1edf \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t; k\u00edch th\u01b0\u1edbc v\u00e0 k\u1ebft n\u1ed1i c\u1ee7a n\u00f3 \u0111\u1ed3ng \u00fd<\/td>\nLo\u1ea1i tr\u1eeb t\u1ea1i v\u1ecb tr\u00ed n\u00e0y<\/td>\nGi\u1eef l\u1ea1i<\/td>\nHo\u00e0n th\u00e0nh c\u00e1c ki\u1ec3m tra k\u1ebft h\u1ee3p c\u00f2n l\u1ea1i<\/td>\n<\/tr>\n
C\u1ea3 hai giao di\u1ec7n \u0111\u1ec1u \u0111\u01b0\u1ee3c cho ph\u00e9p r\u00f5 r\u00e0ng v\u00e0 m\u1ed7i ti\u1ebfp \u0111i\u1ec3m \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t \u0111\u1ec1u kh\u1edbp<\/td>\nGi\u1eef l\u1ea1i<\/td>\nGi\u1eef l\u1ea1i<\/td>\nSo s\u00e1nh c\u1ea3 hai t\u1ed5 h\u1ee3p \u0111\u01b0\u1ee3c t\u00e0i li\u1ec7u h\u00f3a ho\u00e0n ch\u1ec9nh<\/td>\n<\/tr>\n
M\u1ed9t k\u00edch th\u01b0\u1edbc, k\u1ebft n\u1ed1i ho\u1eb7c v\u1ecb tr\u00ed h\u00e0ng b\u1eaft bu\u1ed9c b\u1ecb xung \u0111\u1ed9t<\/td>\nT\u1eeb ch\u1ed1i n\u1ebfu b\u1ecb \u1ea3nh h\u01b0\u1edfng<\/td>\nT\u1eeb ch\u1ed1i n\u1ebfu b\u1ecb \u1ea3nh h\u01b0\u1edfng<\/td>\nN\u1ebfu c\u1ea3 hai xung \u0111\u1ed9t, kh\u00f4ng c\u00f3 c\u00e1i n\u00e0o kh\u1edbp<\/td>\n<\/tr>\n
Giao di\u1ec7n, v\u1ecb tr\u00ed ho\u1eb7c k\u00edch th\u01b0\u1edbc quan tr\u1ecdng \u0111\u01b0\u1ee3c cho ph\u00e9p kh\u00f4ng x\u00e1c \u0111\u1ecbnh<\/td>\nGi\u1eef n\u1ebfu ch\u01b0a gi\u1ea3i quy\u1ebft<\/td>\nGi\u1eef n\u1ebfu ch\u01b0a gi\u1ea3i quy\u1ebft<\/td>\nThu th\u1eadp b\u1eb1ng ch\u1ee9ng c\u00f2n thi\u1ebfu tr\u01b0\u1edbc khi quy\u1ebft \u0111\u1ecbnh<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Xung \u0111\u1ed9t \u0111\u00e3 bi\u1ebft v\u00e0 th\u00f4ng tin c\u00f2n thi\u1ebfu t\u1ea1o ra c\u00e1c k\u1ebft qu\u1ea3 kh\u00e1c nhau. Sai kho\u1ea3ng c\u00e1ch ch\u00e2n c\u1eafm s\u1ebd lo\u1ea1i b\u1ecf \u1ee9ng vi\u00ean \u0111\u00f3. Kho\u1ea3ng c\u00e1ch kh\u00f4ng x\u00e1c \u0111\u1ecbnh s\u1ebd gi\u1eef nguy\u00ean tr\u1ea1ng th\u00e1i ch\u1edd. Kh\u00f4ng s\u1ef1 kh\u00f4ng ch\u1eafc ch\u1eafn c\u0169ng kh\u00f4ng vi\u1ec7c l\u1eafp m\u1eabu th\u00e0nh c\u00f4ng s\u1ebd thi\u1ebft l\u1eadp s\u1ef1 ch\u1ea5p thu\u1eadn.<\/p>\n

So s\u00e1nh K\u00edch th\u01b0\u1edbc Ch\u00e2n c\u1eafm v\u00e0 To\u00e0n b\u1ed9 H\u00e0ng<\/h2>\n

\u0110\u1ed1i v\u1edbi ch\u00e2n<\/strong>, so s\u00e1nh chi\u1ec1u r\u1ed9ng, \u0111\u1ed9 d\u00e0y v\u00e0 ph\u1ea7n nh\u00f4 ra th\u1ef1c t\u1ebf c\u1ee7a ch\u00e2n c\u1eafm v\u1edbi dung sai cho ph\u00e9p, \u0111\u1ed9 s\u00e2u ghi nh\u1eadn v\u00e0 v\u1ecb tr\u00ed c\u1ee7a vai c\u00e1ch \u0111i\u1ec7n.<\/p>\n

\u0110\u1ed1i v\u1edbi ch\u1eef U m\u1edf<\/strong>, so s\u00e1nh kho\u1ea3ng c\u00e1ch ngo\u00e0i, \u0111\u1ed9 m\u1edf khe, k\u00edch th\u01b0\u1edbc c\u00e0ng, \u0111\u1ed9 d\u00e0y v\u00e0 chi\u1ec1u d\u00e0i k\u1ebft n\u1ed1i v\u1edbi k\u1eb9p d\u1ef1 \u0111\u1ecbnh. Khe h\u1edf c\u00f3 th\u1ec3 v\u01b0\u1ee3t qua m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m nh\u01b0ng v\u1eabn c\u00f3 th\u1ec3 \u0111\u1ec3 c\u00e1c c\u00e0ng n\u1eb1m ngo\u00e0i v\u00f9ng ti\u1ebfp x\u00fac \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh.<\/p>\n

Ghi l\u1ea1i k\u00edch th\u01b0\u1edbc b\u1ea3n v\u1ebd v\u00e0 c\u00e1c \u0111i\u1ec3m tham chi\u1ebfu c\u1ee7a ch\u00fang thay v\u00ec so s\u00e1nh hai gi\u00e1 tr\u1ecb \u201cchi\u1ec1u r\u1ed9ng\u201d kh\u00f4ng c\u00f3 nh\u00e3n. Chi\u1ec1u r\u1ed9ng t\u1ed5ng th\u1ec3 c\u1ee7a d\u00e2y d\u1eabn, chi\u1ec1u r\u1ed9ng r\u0103ng v\u00e0 chi\u1ec1u r\u1ed9ng ch\u1eef U-khe m\u00f4 t\u1ea3 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m kh\u00e1c nhau. N\u1ebfu \u00e1nh x\u1ea1 k\u00edch th\u01b0\u1edbc kh\u00f4ng r\u00f5 r\u00e0ng, h\u00e3y y\u00eau c\u1ea7u b\u1ea3n v\u1ebd l\u00e0m r\u00f5.<\/p>\n

\n\"Pin
Ki\u1ec3m tra k\u00edch th\u01b0\u1edbc kh\u00e1i ni\u1ec7m, kh\u00f4ng ph\u1ea3i b\u1ea3n v\u1ebd m\u00f4 h\u00ecnh c\u00f3 k\u00edch th\u01b0\u1edbc YOCL. \u0110\u1ed1i chi\u1ebfu t\u1eebng b\u1ed9 ph\u1eadn v\u1edbi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a \u0111\u1ea7u cu\u1ed1i nh\u1eadn.<\/figcaption><\/figure>\n

Sau \u0111\u00f3, so s\u00e1nh c\u00e1c t\u00e2m ti\u1ebfp \u0111i\u1ec3m tr\u00ean to\u00e0n b\u1ed9 h\u00e0ng d\u1ef1 ki\u1ebfn<\/strong>. Ki\u1ec3m tra chi\u1ec1u cao \u0111\u1ea7u cu\u1ed1i, th\u1ee9 t\u1ef1 thi\u1ebft b\u1ecb v\u00e0 b\u1ea5t k\u1ef3 kho\u1ea3ng tr\u1ed1ng n\u00e0o do thi\u1ebft b\u1ecb ph\u1ee5 t\u1ea1o ra. Chi\u1ec1u r\u1ed9ng m\u00f4-\u0111un danh \u0111\u1ecbnh, chi\u1ec1u d\u00e0i thanh n\u1ed1i t\u1ed5ng th\u1ec3 ho\u1eb7c thanh ray DIN d\u00f9ng chung kh\u00f4ng ho\u00e0n th\u00e0nh vi\u1ec7c so s\u00e1nh \u0111\u00f3. S\u1ef1 th\u1eb3ng h\u00e0ng c\u1ee7a c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u0169ng ph\u1ea3i tu\u00e2n theo tr\u00ecnh t\u1ef1 m\u1ea1ch d\u1ef1 ki\u1ebfn.<\/p>\n

X\u00e1c \u0111\u1ecbnh xem thi\u1ebft b\u1ecb c\u00f3 cho ph\u00e9p thanh n\u1ed1i \u1edf v\u1ecb tr\u00ed k\u1ebft n\u1ed1i tr\u00ean c\u00f9ng, d\u01b0\u1edbi c\u00f9ng ho\u1eb7c v\u1ecb tr\u00ed k\u1ebft n\u1ed1i chuy\u00ean d\u1ee5ng \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t hay kh\u00f4ng; kh\u00f4ng gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng c\u00e1c v\u1ecb tr\u00ed \u0111\u00f3 c\u00f3 th\u1ec3 thay th\u1ebf cho nhau. Trong tr\u01b0\u1eddng h\u1ee3p d\u00e2y d\u1eabn v\u00e0 thanh c\u00e1i d\u00f9ng chung m\u1ed9t \u0111\u1ea7u cu\u1ed1i, h\u00e3y xin ph\u00e9p r\u00f5 r\u00e0ng cho s\u1ef1 k\u1ebft h\u1ee3p v\u00e0 b\u1ed1 tr\u00ed d\u00e2y d\u1eabn \u0111\u00f3.<\/p>\n

C\u00e1c gi\u00e1 tr\u1ecb danh m\u1ee5c t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u00f3 th\u1ec3 che gi\u1ea5u m\u1ed9t giao di\u1ec7n ch\u01b0a \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft<\/h2>\n

Xem x\u00e9t c\u00e1c m\u1ee5c ch\u00ednh x\u00e1c n\u00e0y t\u1eeb c\u00e1c b\u1ea3ng s\u1ea3n ph\u1ea9m BS101 v\u00e0 BS301 c\u1ee7a YOCL:<\/p>\n\n\n\n\n\n\n\n\n\n
Tr\u01b0\u1eddng \u0111\u00e3 xu\u1ea5t b\u1ea3n<\/th>\nBS101-2<\/th>\nBS301-2<\/th>\n<\/tr>\n<\/thead>\n
M\u00e3 danh m\u1ee5c<\/td>\n1Ch\u1ed1t P<\/td>\n1Lo\u1ea1i P ch\u1eef U<\/td>\n<\/tr>\n
Ti\u1ebft di\u1ec7n \u0111\u1ed3ng<\/td>\n10 mm\u00b2<\/td>\n10 mm\u00b2<\/td>\n<\/tr>\n
Dung l\u01b0\u1ee3ng d\u00f2ng \u0111i\u1ec7n theo danh m\u1ee5c<\/td>\n63 A<\/td>\n63 A<\/td>\n<\/tr>\n
\u0110\u1ed9 d\u00e0y, nh\u01b0 ghi nh\u00e3n<\/td>\n1.5 mm<\/td>\n1.5 mm<\/td>\n<\/tr>\n
Chi\u1ec1u r\u1ed9ng, nh\u01b0 ghi nh\u00e3n<\/td>\n7 mm<\/td>\n7 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u0110\u00e2y l\u00e0 c\u00e1c khai b\u00e1o c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t cho c\u00e1c h\u00e0ng m\u1eabu \u0111\u00f3. C\u00e1c tr\u01b0\u1eddng \u0111\u01b0\u1ee3c chia s\u1ebb kh\u00f4ng x\u00e1c \u0111\u1ecbnh m\u1ed9t ti\u1ebfp \u0111i\u1ec3m c\u00f3 th\u1ec3 thay th\u1ebf cho nhau. C\u1ee5 th\u1ec3, chi\u1ec1u r\u1ed9ng \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea kh\u00f4ng t\u1ef1 \u0111\u1ed9ng l\u00e0 chi\u1ec1u r\u1ed9ng r\u0103ng, kho\u1ea3ng c\u00e1ch ngo\u00e0i c\u1ee7a ng\u1ea1nh ho\u1eb7c khe h\u1edf<\/strong>. B\u1ea3ng ch\u1ec9 m\u1ed9t m\u00ecnh kh\u00f4ng thi\u1ebft l\u1eadp b\u01b0\u1edbc ren, \u0111\u1ed9 s\u00e2u gi\u1eef ho\u1eb7c m\u1ed9t m\u1eabu thi\u1ebft b\u1ecb nh\u1eadn \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t.<\/p>\n

\u0110\u1ed1i v\u1edbi ph\u00e9p so s\u00e1nh n\u00e0y, m\u1ed9t b\u1ea3n ghi h\u1eefu \u00edch l\u00e0:<\/p>\n