c\u00e1 \u0111\u1ed9 b\u00f3ng \u0111\u00e1 b\u1ecb ph\u1ea1t nh\u01b0 th\u1ebf n\u00e0o<\/a>?<\/strong><\/p>\nM\u1eb7c d\u00f9 \u0111\u00e2y l\u00e0 m\u1ed9t lo\u1ea1i k\u00e8o c\u00f3 quy t\u1eafc kh\u00e1 ph\u1ee9c t\u1ea1p nh\u01b0ng \u0111\u01b0\u1ee3c nhi\u1ec1u ng\u01b0\u1eddi l\u1ef1a ch\u1ecdn b\u1edfi t\u1ef7 l\u1ec7 tr\u1ea3 th\u01b0\u1edfng c\u1ef1c k\u1ef3 h\u1ea5p d\u1eabn. H\u00ecnh th\u1ee9c c\u00e1 c\u01b0\u1ee3c n\u00e0y c\u00f2n th\u01b0\u1eddng \u0111i k\u00e8m v\u1edbi c\u00e1c t\u1ef7 l\u1ec7 ch\u1ea5p hay t\u1ef7 l\u1ec7 k\u00e8o tr\u1ef1c tuy\u1ebfn \u0111a d\u1ea1ng kh\u00e1c nhau t\u1eeb nh\u00e0 c\u00e1i ph\u1ee5 thu\u1ed9c v\u00e0o t\u01b0\u01a1ng quan s\u1ee9c m\u1ea1nh c\u1ee7a 2 \u0111\u1ed9i.<\/span><\/p>\n<\/span>K\u00e8o t\u00e0i x\u1ec9u trong b\u00f3ng \u0111\u00e1<\/i><\/b><\/span><\/h3>\nK\u00e8o T\u00e0i X\u1ec9u hay c\u00f2n g\u1ecdi l\u00e0 k\u00e8o tr\u00ean d\u01b0\u1edbi, O\/U l\u00e0 h\u00ecnh th\u1ee9c \u0111\u1eb7t c\u01b0\u1ee3c d\u1ef1a tr\u00ean t\u1ed5ng s\u1ed1 b\u00e0n th\u1eafng m\u00e0 c\u1ea3 2 \u0111\u1ed9i ghi \u0111\u01b0\u1ee3c trong to\u00e0n b\u1ed9 tr\u1eadn \u0111\u1ea5u ho\u1eb7c m\u1ed9t hi\u1ec7p n\u00e0o \u0111\u00f3. Trong quy \u01b0\u1edbc th\u00ec c\u1eeda t\u00e0i \u0111\u01b0\u1ee3c d\u00f9ng khi c\u00f3 t\u1ed5ng s\u1ed1 b\u00e0n th\u1eafng l\u1edbn h\u01a1n so v\u1edbi con s\u1ed1 th\u1ef1c t\u1ebf nh\u00e0 c\u00e1i \u0111\u01b0a ra v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.\u00a0<\/span><\/p>\n