\u0110\u1ed1i v\u1edbi nhi\u1ec1u ng\u01b0\u1eddi ch\u01a1i l\u00f4 \u0111\u1ec1 c\u00f3 kinh nghi\u1ec7m, h\u1ecd lu\u00f4n b\u1ecb h\u1ea5p d\u1eabn b\u1edfi nh\u1eefng th\u1eed th\u00e1ch ng\u00e0y c\u00e0ng kh\u00f3 kh\u0103n. Vi\u1ec7c soi 2 s\u1ed1 cu\u1ed1i gi\u1ea3i \u0111\u1eb7c bi\u1ec7t \u0111\u00e3 tr\u1edf n\u00ean qu\u00e1 \u0111\u01a1n gi\u1ea3n v\u00e0 tr\u1edf n\u00ean nh\u00e0m ch\u00e1n \u0111\u1ed1i v\u1edbi h\u1ecd n\u00ean h\u1ecd \u0111\u00e3 t\u00ecm nh\u1eefng c\u00e1ch \u0111\u00e1nh l\u00f4 \u0111\u1ec1 kh\u00e1c kh\u00f3 kh\u0103n h\u01a1n song c\u0169ng thu \u0111\u01b0\u1ee3c nhi\u1ec1u l\u1ee3i nhu\u1eadn h\u01a1n. Ch\u00ednh v\u00ec v\u1eady m\u00e0 nhi\u1ec1u ng\u01b0\u1eddi \u0111\u00e3 l\u1ef1a ch\u1ecdn c\u00e1ch ch\u01a1i 3 c\u00e0ng \u0111\u1ec3 th\u1eed th\u00e1ch b\u1ea3n th\u00e2n nhi\u1ec1u h\u01a1n. Tuy nhi\u00ean kh\u00f4ng ph\u1ea3i ai c\u0169ng bi\u1ebft c\u00e1ch \u0111\u00e1nh 3 c\u00e0ng, do \u0111\u00f3 m\u00e0 h\u00f4m nay ch\u00fang t\u00f4i s\u1ebd gi\u1edbi thi\u1ec7u cho c\u00e1c b\u1ea1n v\u1ec1 3 c\u00e0ng c\u0169ng nh\u01b0 c\u00e1ch d\u1ef1 \u0111o\u00e1n 3 c\u00e0ng<\/b> chu\u1ea9n x\u00e1c nh\u1ea5t hi\u1ec7n nay.<\/p>\nKh\u00e1i ni\u1ec7m v\u1ec1 3 c\u00e0ng<\/b><\/h2>\n
L\u00f4 \u0111\u1ec1 3 c\u00e0ng l\u00e0 g\u00ec?<\/b><\/h3>\n
\u0110\u1ec3 d\u1ef1 \u0111o\u00e1n 3 c\u00e0ng<\/b> chu\u1ea9n x\u00e1c tr\u01b0\u1edbc ti\u00ean ch\u00fang ta ph\u1ea3i hi\u1ec3u v\u1ec1 kh\u00e1i ni\u1ec7m 3 c\u00e0ng tr\u01b0\u1edbc ti\u00ean.<\/p>\n
\u0110\u1ed1i v\u1edbi l\u00f4 \u0111\u1ec1 b\u00ecnh th\u01b0\u1eddng ch\u00fang ta s\u1ebd ch\u1ec9 d\u1ef1 \u0111o\u00e1n 2 s\u1ed1 cu\u1ed1i c\u1ee7a c\u00e1c gi\u1ea3i x\u1ed5 s\u1ed1 mi\u1ec1n b\u1eafc, mi\u1ec1n trung ho\u1eb7c mi\u1ec1n nam. C\u00f2n l\u00f4 \u0111\u1ec1 3 c\u00e0ng ngh\u0129a l\u00e0 b\u1ea1n d\u1ef1 \u0111o\u00e1n 3 s\u1ed1 cu\u1ed1i c\u1ee7a c\u00e1c gi\u1ea3i x\u1ed5 s\u1ed1 3 mi\u1ec1n. Ch\u00ednh v\u00ec v\u1eady, \u1edf m\u1ed7i v\u00f9ng mi\u1ec1n, ch\u00fang ta s\u1ebd c\u00f3 c\u00e1ch soi c\u1ea7u t\u01b0\u01a1ng \u1ee9ng. V\u00ed d\u1ee5 nh\u01b0 soi c\u1ea7u 3 c\u00e0ng mi\u1ec1n Trung<\/strong>, mi\u1ec1n Nam, mi\u1ec1n B\u1eafc.<\/p>\n Nh\u01b0 v\u1eady th\u00ec khi \u0111\u00e1nh 3 c\u00e0ng s\u1ebd kh\u00f3 h\u01a1n r\u1ea5t nhi\u1ec1u so v\u1edbi \u0111\u00e1nh l\u00f4 \u0111\u1ec1 b\u00ecnh th\u01b0\u1eddng v\u00ec 2 l\u00ed do:<\/p>\n L\u00ed do th\u1ee9 nh\u1ea5t \u0111\u00f3 l\u00e0 b\u1ea1n s\u1ebd ph\u1ea3i d\u1ef1 \u0111o\u00e1n tr\u00fang nhi\u1ec1u ch\u1eef s\u1ed1 h\u01a1n so v\u1edbi \u0111\u00e1nh l\u00f4 \u0111\u1ec1 b\u00ecnh th\u01b0\u1eddng;<\/p>\n L\u00ed do th\u1ee9 2 \u0111\u00f3 l\u00e0 s\u1ed1 gi\u1ea3i l\u00f4 s\u1ebd \u00edt h\u01a1n v\u00ec ch\u00fang ta s\u1ebd kh\u00f4ng c\u00f2n gi\u1ea3i 7 XSMB hay gi\u1ea3i 8 c\u1ee7a XSMN.<\/p>\n V\u00ec c\u00e1ch \u0111\u00e1nh kh\u00f3 h\u01a1n n\u00ean t\u1ec9 l\u1ec7 \u0103n chia khi \u0111\u00e1nh 3 c\u00e0ng c\u0169ng kh\u00e1c so v\u1edbi \u0111\u00e1nh l\u00f4 \u0111\u1ec1 th\u00f4ng th\u01b0\u1eddng.<\/p>\n T\u1ec9 l\u1ec7 \u0103n chia c\u1ee7a l\u00f4 \u0111\u1ec1 3 c\u00e0ng dao \u0111\u1ed9ng t\u1eeb 1 \u0103n 400 \u2013 1 \u0103n 700, ngh\u0129a l\u00e0 n\u1ebfu b\u1ea1n \u0111\u00e1nh 100 ngh\u00ecn th\u00ec s\u1ebd \u0103n \u0111\u01b0\u1ee3c 40 \u2013 70 tri\u1ec7u n\u1ebfu tr\u00fang gi\u1ea3i. S\u1ed1 ti\u1ec1n b\u1ecf \u0111\u1ec3 \u0111\u00e1nh 1 \u0111i\u1ec3m l\u00f4 \u0111\u1ec1 3 c\u00e0ng s\u1ebd t\u00f9y thu\u1ed9c v\u00e0o t\u1eebng khu v\u1ef1c song s\u1ebd cao h\u01a1n khi \u0111\u00e1nh 1 \u0111i\u1ec3m l\u00f4 \u0111\u1ec1 th\u00f4ng th\u01b0\u1eddng.<\/p>\nL\u00fd do l\u00f4 \u0111\u1ec1 3 c\u00e0ng kh\u00f3 h\u01a1n so v\u1edbi l\u00f4 b\u00ecnh th\u01b0\u1eddng:<\/b><\/h3>\n
T\u1ef7 l\u1ec7 \u0103n chia khi \u0111\u00e1nh 3 c\u00e0ng:<\/b><\/h3>\n
B\u00ed k\u00edp d\u1ef1 \u0111o\u00e1n 3 c\u00e0ng chu\u1ea9n x\u00e1c 100%<\/b><\/h2>\n
Ph\u01b0\u01a1ng ph\u00e1p \u0111\u00e1nh \u0111\u1ec1 3 c\u00e0ng theo b\u1ea1ch th\u1ee7 l\u00f4<\/b><\/h3>\n