{"id":22168,"date":"2019-04-05T20:21:38","date_gmt":"2019-04-05T13:21:38","guid":{"rendered":"https:\/\/www.baohoxanh.com\/blog\/?p=22168"},"modified":"2026-09-04T10:51:15","modified_gmt":"2026-09-04T03:51:15","slug":"quan-ao-chong-ho-quang-dien-chat-luong-uy-tin-tai-dong-da","status":"publish","type":"post","link":"https:\/\/www.baohoxanh.com\/blog\/quan-ao-chong-ho-quang-dien-chat-luong-uy-tin-tai-dong-da\/","title":{"rendered":"C\u00e1ch Ch\u1ecdn Qu\u1ea7n \u00c1o Ch\u1ed1ng H\u1ed3 Quang \u0110i\u1ec7n V\u00e0 M\u1eb7c Nhi\u1ec1u L\u1edbp"},"content":{"rendered":"

Hai \u0111\u01a1n v\u1ecb c\u00f9ng \u0111\u1eb7t m\u1ed9t m\u00e3 \u0111\u1ed3 ch\u1ed1ng h\u1ed3 quang, nh\u01b0ng khi s\u1ef1 c\u1ed1 x\u1ea3y ra th\u00ec m\u1ee9c t\u1ed5n th\u01b0\u01a1ng l\u1ea1i kh\u00e1c nhau. Kh\u00e1c bi\u1ec7t hi\u1ebfm khi n\u1eb1m \u1edf chi\u1ebfc \u00e1o ngo\u00e0i. N\u00f3 n\u1eb1m \u1edf ba ch\u1ed7 \u00edt ai ki\u1ec3m: m\u1ee9c n\u0103ng l\u01b0\u1ee3ng th\u1eadt t\u1ea1i v\u1ecb tr\u00ed thao t\u00e1c, c\u00e1c l\u1edbp m\u1eb7c k\u00e8m b\u00ean trong l\u1eabn b\u00ean ngo\u00e0i b\u1ed9 \u0111\u1ed3, v\u00e0 th\u1eddi \u0111i\u1ec3m ng\u01b0\u1eddi th\u1ee3 c\u1edfi b\u1ed9 \u0111\u1ed3 ra. B\u00e0i vi\u1ebft \u0111i \u0111\u00fang ba ch\u1ed7 \u0111\u00f3.<\/p>\n

Qu\u1ea7n \u00c1o Ch\u1ed1ng H\u1ed3 Quang \u0110i\u1ec7n B\u1ea3o V\u1ec7 Tr\u01b0\u1edbc Lo\u1ea1i T\u1ed5n Th\u01b0\u01a1ng N\u00e0o<\/h2>\n

H\u1ed3 quang \u0111i\u1ec7n l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng ph\u00f3ng \u0111i\u1ec7n qua kh\u00f4ng kh\u00ed khi x\u1ea3y ra ng\u1eafn m\u1ea1ch, gi\u1ea3i ph\u00f3ng m\u1ed9t l\u01b0\u1ee3ng nhi\u1ec7t v\u00e0 b\u1ee9c x\u1ea1 r\u1ea5t l\u1edbn trong kho\u1ea3ng th\u1eddi gian t\u00ednh b\u1eb1ng ph\u1ea7n ngh\u00ecn gi\u00e2y. B\u1ed9 \u0111\u1ed3 ch\u1ed1ng h\u1ed3 quang kh\u00f4ng ng\u0103n d\u00f2ng \u0111i\u1ec7n \u0111i qua ng\u01b0\u1eddi. Nhi\u1ec7m v\u1ee5 c\u1ee7a n\u00f3 l\u00e0 gi\u1eef cho l\u01b0\u1ee3ng nhi\u1ec7t truy\u1ec1n t\u1edbi da n\u1eb1m d\u01b0\u1edbi ng\u01b0\u1ee1ng g\u00e2y b\u1ecfng n\u1eb7ng, \u0111\u1ed3ng th\u1eddi kh\u00f4ng t\u1ef1 b\u1eaft l\u1eeda \u0111\u1ec3 tr\u1edf th\u00e0nh ngu\u1ed3n ch\u00e1y th\u1ee9 hai \u00e1p s\u00e1t c\u01a1 th\u1ec3.<\/p>\n

V\u00ec v\u1eady m\u1ed9t b\u1ed9 trang b\u1ecb \u0111\u1ee7 cho th\u1ee3 thao t\u00e1c t\u1ee7 \u0111ang mang t\u1ea3i lu\u00f4n g\u1ed3m hai nh\u00e1nh ch\u1ea1y song song. Nh\u00e1nh ch\u1eb7n \u0111i\u1ec7n gi\u1eadt g\u1ed3m g\u0103ng cao su c\u00e1ch \u0111i\u1ec7n \u0111\u00fang c\u1ea5p \u0111i\u1ec7n \u00e1p<\/a> c\u00f9ng trang b\u1ecb n\u1ed1i \u0111\u1ea5t. Nh\u00e1nh ch\u1eb7n nhi\u1ec7t g\u1ed3m \u00e1o li\u1ec1n qu\u1ea7n ch\u1ed1ng h\u1ed3 quang \u0111i\u1ec7n<\/a> v\u00e0 m\u0169 tr\u00f9m ho\u1eb7c t\u1ea5m che m\u1eb7t t\u01b0\u01a1ng \u1ee9ng. Thi\u1ebfu m\u1ed9t nh\u00e1nh l\u00e0 b\u1ecf tr\u1ed1ng m\u1ed9t lo\u1ea1i r\u1ee7i ro ch\u1ee9 kh\u00f4ng ph\u1ea3i thi\u1ebfu m\u1ed9t m\u00f3n h\u00e0ng.<\/p>\n

\"B\u1ed9<\/p>\n

C\u00e1ch Ch\u1ecdn Qu\u1ea7n \u00c1o Ch\u1ed1ng H\u1ed3 Quang \u0110i\u1ec7n Theo N\u0103ng L\u01b0\u1ee3ng S\u1ef1 C\u1ed1<\/h2>\n

Con s\u1ed1 ghi tr\u00ean nh\u00e3n b\u1ed9 \u0111\u1ed3 ch\u1ec9 c\u00f3 ngh\u0129a khi \u0111\u1eb7t c\u1ea1nh m\u1ed9t con s\u1ed1 th\u1ee9 hai: m\u1ee9c n\u0103ng l\u01b0\u1ee3ng m\u00e0 ch\u00ednh ch\u1ed7 ng\u01b0\u1eddi th\u1ee3 \u0111\u1ee9ng ph\u1ea3i h\u1ee9ng khi c\u00f3 s\u1ef1 c\u1ed1. M\u1ee9c \u0111\u00f3 ph\u1ee5 thu\u1ed9c c\u1ea5u h\u00ecnh l\u01b0\u1edbi, d\u00f2ng ng\u1eafn m\u1ea1ch, th\u1eddi gian c\u1eaft c\u1ee7a b\u1ea3o v\u1ec7 v\u00e0 kho\u1ea3ng c\u00e1ch t\u1eeb m\u1eb7t ng\u01b0\u1eddi t\u1edbi \u0111i\u1ec3m ph\u00f3ng. N\u00f3 l\u00e0 s\u1ed1 li\u1ec7u do \u0111\u01a1n v\u1ecb v\u1eadn h\u00e0nh t\u00ednh ra, kh\u00f4ng ph\u1ea3i s\u1ed1 li\u1ec7u nh\u00e0 cung c\u1ea5p qu\u1ea7n \u00e1o \u0111\u01b0a cho.<\/p>\n

Nguy\u00ean t\u1eafc ch\u1ecdn g\u00f3i trong m\u1ed9t c\u00e2u: ch\u1ec9 s\u1ed1 c\u00f4ng b\u1ed1 c\u1ee7a b\u1ed9 \u0111\u1ed3 kh\u00f4ng \u0111\u01b0\u1ee3c th\u1ea5p h\u01a1n k\u1ebft qu\u1ea3 t\u00ednh to\u00e1n cho \u0111\u00fang ch\u1ed7 \u0111\u00f3. Kh\u00f4ng c\u00f3 con s\u1ed1 chung d\u00f9ng cho m\u1ecdi t\u1ee7 \u0111i\u1ec7n, v\u00e0 c\u0169ng kh\u00f4ng suy \u0111\u01b0\u1ee3c t\u1eeb c\u1ea5p \u0111i\u1ec7n \u00e1p. \u0110\u01a1n v\u1ecb ch\u01b0a c\u00f3 k\u1ebft qu\u1ea3 t\u00ednh to\u00e1n th\u00ec vi\u1ec7c ph\u1ea3i l\u00e0m tr\u01b0\u1edbc ti\u00ean l\u00e0 \u0111\u1eb7t h\u00e0ng ph\u1ea7n t\u00ednh to\u00e1n \u0111\u00f3, ch\u1ee9 kh\u00f4ng ph\u1ea3i ch\u1ecdn nhanh m\u1ed9t m\u00e3 \u0111\u1ed3 cho c\u00f3.<\/p>\n

M\u1ed9t kh\u00e1i ni\u1ec7m \u0111i k\u00e8m c\u1ea7n bi\u1ebft l\u00e0 ranh gi\u1edbi h\u1ed3 quang: v\u00f2ng quanh thi\u1ebft b\u1ecb m\u00e0 b\u00ean ngo\u00e0i n\u00f3, n\u0103ng l\u01b0\u1ee3ng r\u01a1i xu\u1ed1ng d\u01b0\u1edbi ng\u01b0\u1ee1ng g\u00e2y b\u1ecfng cho v\u00f9ng da h\u1edf. Ranh gi\u1edbi n\u00e0y \u0111\u01b0\u1ee3c ghi tr\u00ean nh\u00e3n c\u1ea3nh b\u00e1o d\u00e1n t\u1ea1i t\u1ee7. Ng\u01b0\u1eddi kh\u00f4ng c\u00f3 nhi\u1ec7m v\u1ee5 ph\u1ea3i \u0111\u1ee9ng ngo\u00e0i v\u00f2ng \u0111\u00f3, k\u1ec3 c\u1ea3 khi h\u1ecd ch\u1ec9 \u0111\u1ee9ng xem. \u0110\u00e2y l\u00e0 bi\u1ec7n ph\u00e1p kh\u00f4ng t\u1ed1n ti\u1ec1n mua s\u1eafm.<\/p>\n

M\u1eb7c Ch\u1ed3ng Nhi\u1ec1u L\u1edbp C\u00f3 C\u1ed9ng \u0110\u01b0\u1ee3c C\u1ea5p B\u1ea3o V\u1ec7 Kh\u00f4ng<\/h2>\n

Tr\u1ea3 l\u1eddi ng\u1eafn: kh\u00f4ng c\u1ed9ng b\u1eb1ng ph\u00e9p c\u1ed9ng s\u1ed1 h\u1ecdc. Ph\u01b0\u01a1ng ph\u00e1p th\u1eed d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh m\u1ee9c ch\u1ecbu h\u1ed3 quang cho ph\u00e9p th\u1eed m\u1ed9t v\u1eadt li\u1ec7u ho\u1eb7c m\u1ed9t t\u1ed5 h\u1ee3p v\u1eadt li\u1ec7u, ngh\u0129a l\u00e0 mu\u1ed1n bi\u1ebft con s\u1ed1 c\u1ee7a c\u1ea3 b\u1ed9 nhi\u1ec1u l\u1edbp th\u00ec ph\u1ea3i \u0111em \u0111\u00fang t\u1ed5 h\u1ee3p \u0111\u00f3 \u0111i th\u1eed theo \u0111\u00fang th\u1ee9 t\u1ef1 s\u1ebd m\u1eb7c. Ph\u1ea1m vi \u00e1p d\u1ee5ng c\u1ee7a ph\u00e9p th\u1eed \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 trong ti\u00eau chu\u1ea9n ASTM F1959<\/a>.<\/p>\n

Con s\u1ed1 c\u00f4ng b\u1ed1 tr\u00ean nh\u00e3n b\u1ed9 \u0111\u1ed3 sinh ra t\u1eeb m\u1ed9t trong hai nh\u00e1nh ph\u01b0\u01a1ng ph\u00e1p th\u1eed kh\u00e1c nhau, v\u00e0 bi\u1ebft m\u00ecnh \u0111ang c\u1ea7m con s\u1ed1 thu\u1ed9c nh\u00e1nh n\u00e0o l\u00e0 vi\u1ec7c ph\u1ea3i l\u00e0m tr\u01b0\u1edbc khi \u0111\u1eb7t hai b\u1ed9 c\u1ea1nh nhau. Nh\u00e1nh h\u1ed3 quang h\u1edf cho c\u00e1c tr\u1ecb s\u1ed1 ki\u1ec3u ATPV, ELIM v\u00e0 EBT, \u0111\u1ecdc b\u1eb1ng \u0111\u01a1n v\u1ecb n\u0103ng l\u01b0\u1ee3ng tr\u00ean \u0111\u01a1n v\u1ecb di\u1ec7n t\u00edch. Nh\u00e1nh ph\u01b0\u01a1ng ph\u00e1p h\u1ed9p m\u00f4 t\u1ea3 trong IEC 61482-1-2 th\u00ec ph\u00e2n th\u00e0nh hai c\u1ea5p b\u1ea3o v\u1ec7 v\u00e0 kh\u00f4ng tr\u1ea3 v\u1ec1 tr\u1ecb s\u1ed1 n\u0103ng l\u01b0\u1ee3ng n\u00e0o. Hai c\u00e1ch ghi n\u00e0y kh\u00f4ng quy \u0111\u1ed5i cho nhau, n\u00ean \u0111\u1eb7t m\u1ed9t b\u1ed9 ghi c\u1ea5p b\u1ea3o v\u1ec7 c\u1ea1nh m\u1ed9t b\u1ed9 ghi tr\u1ecb s\u1ed1 r\u1ed3i k\u1ebft lu\u1eadn b\u1ed9 n\u00e0o cao h\u01a1n l\u00e0 ph\u00e9p so kh\u00f4ng c\u00f3 c\u01a1 s\u1edf.<\/p>\n

K\u1ebft qu\u1ea3 c\u1ee7a t\u1ed5 h\u1ee3p th\u01b0\u1eddng cao h\u01a1n t\u1ed5ng s\u1ed1 h\u1ecdc c\u1ee7a t\u1eebng l\u1edbp, v\u00ec l\u1edbp kh\u00f4ng kh\u00ed k\u1eb9t gi\u1eefa hai l\u1edbp v\u1ea3i c\u0169ng c\u1ea3n nhi\u1ec7t. Nh\u01b0ng c\u1ee5m ch\u1eef th\u01b0\u1eddng cao h\u01a1n kh\u00f4ng ph\u1ea3i l\u00e0 con s\u1ed1 d\u00f9ng \u0111\u01b0\u1ee3c \u0111\u1ec3 l\u1eadp h\u1ed3 s\u01a1 an to\u00e0n. Ch\u1ec9 khi nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e3 th\u1eed \u0111\u00fang c\u1eb7p v\u1ea3i \u0111\u00f3 v\u00e0 c\u00f4ng b\u1ed1 k\u1ebft qu\u1ea3 th\u00ec \u0111\u01a1n v\u1ecb m\u1edbi c\u00f3 c\u0103n c\u1ee9 ghi v\u00e0o bi\u1ec7n ph\u00e1p thi c\u00f4ng.<\/p>\n

Ba vi\u1ec7c r\u00fat ra khi trang b\u1ecb theo ki\u1ec3u nhi\u1ec1u l\u1edbp: h\u1ecfi nh\u00e0 cung c\u1ea5p xem l\u1edbp trong v\u00e0 l\u1edbp ngo\u00e0i \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1eed chung ch\u01b0a; n\u1ebfu ch\u01b0a th\u00ec ch\u1ec9 l\u1ea5y con s\u1ed1 c\u1ee7a ri\u00eang l\u1edbp ngo\u00e0i c\u00f9ng l\u00e0m c\u0103n c\u1ee9; v\u00e0 kh\u00f4ng gh\u00e9p \u00e1o h\u00e3ng n\u00e0y v\u1edbi qu\u1ea7n h\u00e3ng kia r\u1ed3i c\u1ed9ng hai con s\u1ed1 in tr\u00ean hai c\u00e1i nh\u00e3n.<\/p>\n

\"\u00c1o<\/p>\n

B\u1ed9 Li\u1ec1n Qu\u1ea7n So V\u1edbi \u00c1o Qu\u1ea7n R\u1eddi Khi C\u00f3 H\u1ed3 Quang<\/h2>\n

B\u1ed9 li\u1ec1n qu\u1ea7n kh\u00e9p k\u00edn t\u1eeb c\u1ed5 xu\u1ed1ng c\u1ed5 ch\u00e2n, kh\u00f4ng c\u00f3 \u0111\u01b0\u1eddng h\u1edf ngang eo. Khi lu\u1ed3ng kh\u00ed n\u00f3ng \u1eadp t\u1edbi t\u1eeb ph\u00eda d\u01b0\u1edbi l\u00ean, \u0111\u00e2y l\u00e0 kh\u00e1c bi\u1ec7t \u0111\u00e1ng k\u1ec3: \u00e1o qu\u1ea7n r\u1eddi lu\u00f4n c\u00f3 m\u1ed9t khe gi\u1eefa g\u1ea5u \u00e1o v\u00e0 c\u1ea1p qu\u1ea7n, v\u00e0 khe \u0111\u00f3 m\u1edf r\u1ed9ng ra \u0111\u00fang l\u00fac ng\u01b0\u1eddi th\u1ee3 gi\u01a1 tay l\u00ean thao t\u00e1c.<\/p>\n

\u0110\u1ed5i l\u1ea1i, b\u1ed9 li\u1ec1n qu\u1ea7n n\u00f3ng h\u01a1n, m\u1eb7c v\u00e0 c\u1edfi l\u00e2u h\u01a1n, kh\u00f3 x\u1eed l\u00fd khi c\u1ea7n r\u1eddi v\u1ecb tr\u00ed gi\u1eefa ca, v\u00e0 n\u1ebfu d\u00ednh d\u1ea7u \u1edf m\u1ed9t ch\u1ed7 th\u00ec ph\u1ea3i thay c\u1ea3 b\u1ed9. \u00c1o qu\u1ea7n r\u1eddi g\u1ecdn h\u01a1n cho c\u00f4ng vi\u1ec7c k\u00e9o d\u00e0i c\u1ea3 ng\u00e0y m\u00e0 ch\u1ec9 c\u00f3 v\u00e0i l\u1ea7n thao t\u00e1c ng\u1eafn \u1edf v\u1ecb tr\u00ed c\u00f3 nguy c\u01a1.<\/p>\n

C\u00e1ch ch\u1ecdn theo ki\u1ec3u ca l\u00e0m vi\u1ec7c: t\u1ed5 chuy\u00ean \u0111\u00f3ng c\u1eaft, ra v\u00e0o v\u00f9ng nguy hi\u1ec3m nhi\u1ec1u l\u1ea7n trong ca th\u00ec b\u1ed9 li\u1ec1n qu\u1ea7n kho\u00e1c nhanh b\u00ean ngo\u00e0i \u0111\u1ed3ng ph\u1ee5c l\u00e0 h\u1ee3p l\u00fd; t\u1ed5 b\u1ea3o tr\u00ec \u1edf l\u00e2u trong khu v\u1ef1c \u0111\u00e3 c\u1eaft \u0111i\u1ec7n th\u00ec \u00e1o qu\u1ea7n r\u1eddi ti\u1ec7n h\u01a1n. V\u1edbi \u00e1o qu\u1ea7n r\u1eddi, ph\u1ea3i quy \u0111\u1ecbnh th\u00e0nh v\u0103n r\u1eb1ng \u00e1o lu\u00f4n b\u1ecf trong qu\u1ea7n v\u00e0 c\u1ed5 tay lu\u00f4n c\u00e0i k\u00edn.<\/p>\n

M\u0169 Tr\u00f9m Ch\u1ed1ng H\u1ed3 Quang V\u00e0 T\u1ea5m Che M\u1eb7t Kh\u00e1c Nhau Ra Sao<\/h2>\n

T\u1ea5m che m\u1eb7t g\u1eafn tr\u00ean g\u1ecdng \u0111\u1ed9i \u0111\u1ea7u ch\u1ec9 che ph\u1ea7n m\u1eb7t ph\u00eda tr\u01b0\u1edbc. Ph\u1ea7n g\u00e1y, hai tai v\u00e0 v\u00f9ng c\u1ed5 v\u1eabn h\u1edf, trong khi lu\u1ed3ng nhi\u1ec7t lan theo m\u1ecdi h\u01b0\u1edbng v\u00e0 c\u00f2n d\u1ed9i l\u1ea1i t\u1eeb t\u01b0\u1eddng, t\u1eeb v\u1ecf t\u1ee7 kim lo\u1ea1i. M\u0169 tr\u00f9m ch\u1ed1ng h\u1ed3 quang bao k\u00edn c\u1ea3 \u0111\u1ea7u l\u1eabn c\u1ed5, ch\u1ec9 ch\u1eeba m\u1ed9t \u00f4 nh\u00ecn c\u00f3 l\u1edbp l\u1ecdc.<\/p>\n

Hai m\u00f3n n\u00e0y v\u00ec th\u1ebf kh\u00f4ng thay nhau \u0111\u01b0\u1ee3c. \u1ede m\u1ee9c n\u0103ng l\u01b0\u1ee3ng th\u1ea5p v\u00e0 thao t\u00e1c \u0111\u01a1n gi\u1ea3n, t\u1ea5m che m\u1eb7t k\u00e8m m\u0169 v\u1ea3i ch\u1ed1ng ch\u00e1y \u0111\u1ed9i b\u00ean trong l\u00e0 c\u1ea5u h\u00ecnh th\u01b0\u1eddng g\u1eb7p. Khi n\u0103ng l\u01b0\u1ee3ng t\u1ea1i v\u1ecb tr\u00ed thao t\u00e1c cao h\u01a1n, c\u1ea5u h\u00ecnh chuy\u1ec3n sang m\u0169 tr\u00f9m k\u00edn. Ranh gi\u1edbi gi\u1eefa hai c\u1ea5u h\u00ecnh do k\u1ebft qu\u1ea3 t\u00ednh to\u00e1n quy\u1ebft \u0111\u1ecbnh, kh\u00f4ng do th\u00f3i quen c\u1ee7a t\u1ed5.<\/p>\n

Ba \u0111i\u1ec3m c\u1ea7n ki\u1ec3m khi nh\u1eadn h\u00e0ng: t\u1ea5m che ph\u1ea3i c\u00f3 c\u00f4ng b\u1ed1 ri\u00eang ch\u1ee9 kh\u00f4ng m\u01b0\u1ee3n con s\u1ed1 c\u1ee7a b\u1ed9 qu\u1ea7n \u00e1o; m\u0169 c\u1ee9ng \u0111\u1ed9i k\u00e8m ph\u1ea3i l\u00e0 lo\u1ea1i d\u00f9ng cho c\u00f4ng vi\u1ec7c \u0111i\u1ec7n, \u0111\u1ed1i chi\u1ebfu ki\u1ec3u khe g\u1eafn trong nh\u00f3m m\u0169 b\u1ea3o h\u1ed9 c\u00f3 k\u00ednh che m\u1eb7t<\/a>; v\u00e0 \u00f4 nh\u00ecn ph\u1ea3i \u0111\u1ee7 r\u1ed9ng \u0111\u1ec3 ng\u01b0\u1eddi th\u1ee3 kh\u00f4ng ph\u1ea3i nghi\u00eang \u0111\u1ea7u li\u00ean t\u1ee5c khi thao t\u00e1c trong t\u1ee7 h\u1eb9p.<\/p>\n

\"M\u0169<\/p>\n

Tr\u00ecnh T\u1ef1 M\u1eb7c V\u00e0 C\u1edfi Khi Ra V\u00e0o V\u00f9ng Nguy Hi\u1ec3m<\/h2>\n

Ph\u1ea7n l\u1edbn trang b\u1ecb ch\u1ed1ng h\u1ed3 quang m\u1ea5t t\u00e1c d\u1ee5ng kh\u00f4ng ph\u1ea3i v\u00ec h\u1ecfng m\u00e0 v\u00ec m\u1eb7c sai th\u1ee9 t\u1ef1 ho\u1eb7c c\u1edfi s\u1edbm. Tr\u00ecnh t\u1ef1 d\u01b0\u1edbi \u0111\u00e2y g\u1ecdn v\u00e0 d\u1ec5 \u0111\u01b0a v\u00e0o bu\u1ed5i hu\u1ea5n luy\u1ec7n \u0111\u1ea7u ca:<\/p>\n

    \n
  1. Th\u00e1o \u0111\u1ed3ng h\u1ed3, nh\u1eabn, v\u00f2ng tay v\u00e0 th\u1ebb \u0111eo c\u00f3 d\u00e2y s\u1ee3i t\u1ed5ng h\u1ee3p tr\u01b0\u1edbc khi m\u1eb7c b\u1ea5t k\u1ef3 l\u1edbp n\u00e0o.<\/li>\n
  2. Ki\u1ec3m l\u1edbp m\u1eb7c trong c\u00f9ng: ch\u1ec9 d\u00f9ng cotton ho\u1eb7c lo\u1ea1i v\u1ea3i \u0111\u00e3 qua th\u1eed nghi\u1ec7m h\u1ed3 quang.<\/li>\n
  3. M\u1eb7c b\u1ed9 \u0111\u1ed3 b\u1ea3o v\u1ec7, c\u00e0i k\u00edn c\u1ed5 tay v\u00e0 c\u1ed5 \u00e1o, ki\u1ec3m l\u1ea1i ph\u1ea7n h\u1edf ngang eo n\u1ebfu d\u00f9ng \u00e1o qu\u1ea7n r\u1eddi.<\/li>\n
  4. \u0110\u1ed9i m\u0169 tr\u00f9m ho\u1eb7c l\u1eafp t\u1ea5m che m\u1eb7t, ch\u1ec9nh sao cho kh\u00f4ng c\u00f2n khe h\u1edf \u1edf hai b\u00ean th\u00e1i d\u01b0\u01a1ng.<\/li>\n
  5. \u0110eo g\u0103ng c\u00e1ch \u0111i\u1ec7n \u0111\u00fang c\u1ea5p sau c\u00f9ng, v\u00ec \u0111\u00e2y l\u00e0 m\u00f3n c\u1ea3n tr\u1edf nh\u1ea5t khi c\u00f2n ph\u1ea3i m\u1eb7c c\u00e1c l\u1edbp kh\u00e1c.<\/li>\n
  6. K\u1ebft th\u00fac c\u00f4ng vi\u1ec7c th\u00ec ch\u1ec9 c\u1edfi sau khi \u0111\u00e3 ra kh\u1ecfi ranh gi\u1edbi ghi tr\u00ean nh\u00e3n c\u1ea3nh b\u00e1o, v\u00e0 c\u1edfi theo th\u1ee9 t\u1ef1 ng\u01b0\u1ee3c l\u1ea1i.<\/li>\n<\/ol>\n

    M\u1ed9t quy t\u1eafc \u0111i k\u00e8m quan tr\u1ecdng ngang tr\u00ecnh t\u1ef1: khi ph\u1ea3i m\u1edf l\u1ea1i t\u1ee7 \u0111\u1ec3 xem th\u00eam m\u1ed9t l\u1ea7n n\u1eefa, coi nh\u01b0 b\u1eaft \u0111\u1ea7u l\u1ea1i t\u1eeb b\u01b0\u1edbc m\u1ed9t. R\u1ea5t nhi\u1ec1u ca b\u1ecfng x\u1ea3y ra \u1edf l\u1ea7n quay l\u1ea1i th\u1ee9 hai, l\u00fac ng\u01b0\u1eddi th\u1ee3 ngh\u0129 m\u00ecnh ch\u1ec9 nh\u00ecn m\u1ed9t ch\u00fat n\u00ean kh\u00f4ng m\u1eb7c l\u1ea1i \u0111\u1ee7 l\u1edbp.<\/p>\n

    Ba L\u1ed7i L\u00e0m H\u1ecfng B\u1ed9 \u0110\u1ed3 V\u1eabn C\u00f2n \u0110ang T\u1ed1t<\/h2>\n