{"id":9061,"date":"2021-11-21T15:46:01","date_gmt":"2021-11-21T08:46:01","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=9061"},"modified":"2021-11-21T17:15:27","modified_gmt":"2021-11-21T10:15:27","slug":"tai-sao-khau-do-cua-dam-cang-lon-thi-dam-phai-cang-day","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/tai-sao-khau-do-cua-dam-cang-lon-thi-dam-phai-cang-day\/","title":{"rendered":"T\u1ea1i sao kh\u1ea9u \u0111\u1ed9 c\u1ee7a d\u1ea7m c\u00e0ng l\u1edbn th\u00ec d\u1ea7m ph\u1ea3i c\u00e0ng d\u00e0y?"},"content":{"rendered":"\n

M\u1ed9t v\u1eadt ki\u1ebfn tr\u00fac c\u0169ng nh\u01b0 th\u00e2n th\u1ec3 con ng\u01b0\u1eddi, ph\u1ea3i nh\u1edd v\u00e0o b\u1ed9 khung x\u01b0\u01a1ng m\u1edbi c\u00f3 th\u1ec3 \u0111\u1ee9ng l\u00ean \u0111\u01b0\u1ee3c, b\u1ed9 khung x\u01b0\u01a1ng c\u1ee7a v\u1eadt ki\u1ebfn tr\u00fac g\u1ecdi l\u00e0 “k\u1ebft c\u1ea5u”, t\u00e1c d\u1ee5ng c\u1ee7a n\u00f3 l\u00e0 ch\u1ecbu tr\u1ecdng l\u1ef1c, truy\u1ec1n to\u00e0n b\u1ed9 tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a ng\u01b0\u1eddi v\u00e0 \u0111\u1ed3 v\u1eadt \u1edf trong nh\u00e0, v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng b\u1ea3n th\u00e2n v\u1eadt ki\u1ebfn tr\u00fac xu\u1ed1ng m\u00f3ng \u1edf d\u01b0\u1edbi \u0111\u1ea5t.<\/p>\n\n\n\n

Ki\u1ebfn tr\u00fac th\u1eddi c\u1ed5 \u0111\u1ea1i t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u01a1n gi\u1ea3n, ph\u1ea7n l\u1edbn d\u00f9ng ph\u01b0\u01a1ng th\u1ee9c “k\u1ebft c\u1ea5u d\u1ea7m c\u1ed9t”, t\u1ee9c l\u00e0 d\u00f9ng hai thanh g\u1ed7 ho\u1eb7c \u0111\u00e1 d\u1ef1ng l\u00ean th\u00e0nh c\u1ed9t, \u0111\u1ea7u d\u01b0\u1edbi ch\u00f4n xu\u1ed1ng \u0111\u1ea5t, b\u00ean tr\u00ean g\u00e1c m\u1ed9t thanh g\u1ed7 ho\u1eb7c \u0111\u00e1 g\u1ecdi l\u00e0 “d\u1ea7m”, t\u1eebng d\u00e3y c\u1ed9t \u0111\u1ee1 t\u1eebng d\u00e3y d\u1ea7m, r\u1ed3i l\u00e0m m\u1ed9t m\u00e1i nh\u00e0 l\u00ean tr\u00ean, th\u1ebf l\u00e0 ho\u00e0n th\u00e0nh qu\u00e1 tr\u00ecnh ki\u1ebfn tr\u00fac. M\u1ed9t s\u1ed1 \u0111\u1ec1n mi\u1ebfu th\u1edd th\u1ea7n n\u1ed5i ti\u1ebfng c\u1ee7a Ai c\u1eadp v\u00e0 Hy L\u1ea1p c\u1ed5 \u0111\u1ea1i ph\u1ea7n l\u1edbn \u0111\u1ec1u x\u00e2y d\u1ef1ng b\u1eb1ng \u0111\u00e1, c\u00e1c cung \u0111i\u1ec7n \u0111\u1ec1n ch\u00f9a c\u1ee7a Trung Qu\u1ed1c th\u01b0\u1eddng d\u00f9ng k\u1ebft c\u1ea5u g\u1ed7. C\u00e1c nh\u00e0 \u1edf d\u00e2n c\u01b0 b\u00ecnh th\u01b0\u1eddng c\u00f2n \u0111\u01a1n gi\u1ea3n h\u01a1n, h\u1ecd th\u01b0\u1eddng d\u00f9ng g\u1ea1ch nung ho\u1eb7c g\u1ea1ch m\u1ed9c \u0111\u1ec3 thay cho c\u1ed9t l\u00e0m khung t\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng, nh\u01b0ng b\u00ean trong c\u00f2n c\u00f3 d\u1ea7m ngang \u0111\u1ec3 \u0111\u1ee1 m\u00e1i nh\u00e0.<\/p>\n\n\n\n

\u0110\u1ed1i v\u1edbi d\u1ea7m m\u00e0 n\u00f3i th\u00ec kho\u1ea3ng c\u00e1ch gi\u1eefa hai c\u1ed9t g\u1ecdi l\u00e0 “kh\u1ea9u \u0111\u1ed9”, t\u1ee9c l\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a d\u1ea7m ph\u1ea3i b\u1eafc qua.<\/p>\n\n\n\n

M\u1ed7i ng\u01b0\u1eddi \u0111\u1ec1u c\u00f3 kinh nghi\u1ec7m nh\u01b0 th\u1ebf n\u00e0y: Khi g\u00e1c m\u1ed9t thanh g\u1ed7 h\u00ecnh ch\u1eef nh\u1eadt l\u00ean cao, n\u1ebfu kh\u1ea9u \u0111\u1ed9 t\u0103ng l\u00ean m\u1ed9t m\u1ee9c \u0111\u1ed9 nh\u1ea5t \u0111\u1ecbnh n\u00e0o \u0111\u00f3, th\u00ec gi\u1eefa thanh g\u1ed7 s\u1ebd d\u1ea7n d\u1ea7n v\u00f5ng xu\u1ed1ng; n\u1ebfu ta l\u1eadt c\u1ea1nh ng\u1eafn c\u1ee7a thanh g\u1ed7 h\u00ecnh ch\u1eef nh\u1eadt g\u00e1c l\u00ean, l\u00e0m t\u0103ng chi\u1ec1u d\u00e0y (ho\u1eb7c chi\u1ec1u cao) c\u1ee7a thanh g\u1ed7 d\u1ef1ng “\u0111\u1ee9ng”, th\u00ec thanh g\u1ed7 kh\u00f3 b\u1ecb v\u00f5ng xu\u1ed1ng. Trong ki\u1ebfn tr\u00fac, quan h\u1ec7 gi\u1eefa chi\u1ec1u d\u00e0y c\u1ee7a d\u1ea7m v\u00e0 kh\u1ea9u \u0111\u1ed9 c\u1ee7a n\u00f3, c\u0169ng gi\u1ed1ng t\u00ecnh h\u00ecnh thanh g\u1ed7 n\u00f3i tr\u00ean, tuy r\u1eb1ng c\u00f2n h\u00e0m ch\u1ee9a m\u1ed9t nguy\u00ean l\u00fd c\u01a1 h\u1ecdc ph\u1ee9c t\u1ea1p (ph\u00eda tr\u00ean c\u1ee7a d\u1ea7m ch\u1ecbu l\u1ef1c n\u00e9n, ph\u00eda d\u01b0\u1edbi ch\u1ecbu l\u1ef1c k\u00e9o), nh\u01b0ng d\u1ea7m \u0111\u01b0\u1ee3c t\u0103ng chi\u1ec1u d\u00e0y c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u1ef1ng \u0111\u01b0\u1ee3c l\u1ef1c n\u00e9n v\u00e0 l\u1ef1c k\u00e9o c\u00e0ng l\u1edbn h\u01a1n, th\u00ec r\u00f5 r\u00e0ng l\u00e0 d\u1ec5 th\u1ea5y \u0111\u01b0\u1ee3c. Khi kh\u1ea9u \u0111\u1ed9 c\u1ee7a d\u1ea7m t\u0103ng d\u1ea7n l\u00ean, th\u00ec chi\u1ec1u d\u00e0y v\u1ed1n c\u00f3 c\u1ee7a n\u00f3 kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 ch\u1ecbu tr\u1ecdng l\u01b0\u1ee3ng thi\u1ebft k\u1ebf<\/a> c\u1ea7n thi\u1ebft, ch\u1ec9 c\u00f3 th\u1ec3 l\u00e0m to h\u01a1n d\u00e0y h\u01a1n m\u1edbi kh\u00f4ng b\u1ecb n\u1ee9t g\u00e3y. Trong m\u1ed9t s\u1ed1 ki\u1ebfn tr\u00fac r\u1ed9ng l\u1edbn ch\u00fang ta th\u01b0\u1eddng c\u00f3 th\u1ec3 th\u1ea5y r\u1ea5t nhi\u1ec1u d\u1ea7m ngang r\u1ea5t to, ch\u00ednh l\u00e0 v\u00ec l\u1ebd \u0111\u00f3.<\/p>\n\n\n\n

Trong nh\u1eefng \u0111i\u1ec1u ki\u1ec7n th\u00f4ng th\u01b0\u1eddng, thi\u1ebft k\u1ebf<\/a> m\u1ed9t d\u1ea7m b\u1eb1ng b\u00eat\u00f4ng c\u1ed1t th\u00e9p th\u00ec chi\u1ec1u d\u00e0y c\u1ee7a n\u00f3 b\u1eb1ng 1\/12 – 1\/10 kh\u1ea9u \u0111\u1ed9, c\u00f3 ngh\u0129a l\u00e0 kh\u1ea9u \u0111\u1ed9 c\u1ee7a n\u00f3 l\u00e0 6 m, th\u00ec chi\u1ec1u d\u00e0y c\u1ee7a d\u1ea7m ph\u1ea3i l\u00e0 50-60 cm.<\/p>\n\n\n\n

T\u1eeb kh\u00f3a: D\u1ea7m; K\u1ebft c\u1ea5u c\u00f4ng tr\u00ecnh; Kh\u1ea9u \u0111\u1ed9.<\/p>\n","protected":false},"excerpt":{"rendered":"

M\u1ed9t v\u1eadt ki\u1ebfn tr\u00fac c\u0169ng nh\u01b0 th\u00e2n th\u1ec3 con ng\u01b0\u1eddi, ph\u1ea3i nh\u1edd v\u00e0o b\u1ed9 khung x\u01b0\u01a1ng m\u1edbi c\u00f3 th\u1ec3 \u0111\u1ee9ng l\u00ean \u0111\u01b0\u1ee3c, b\u1ed9 khung x\u01b0\u01a1ng c\u1ee7a v\u1eadt ki\u1ebfn tr\u00fac g\u1ecdi l\u00e0 “k\u1ebft c\u1ea5u”, t\u00e1c d\u1ee5ng c\u1ee7a n\u00f3 l\u00e0 ch\u1ecbu tr\u1ecdng l\u1ef1c, truy\u1ec1n to\u00e0n b\u1ed9 tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a ng\u01b0\u1eddi v\u00e0 \u0111\u1ed3 v\u1eadt \u1edf trong nh\u00e0, v\u00e0 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,16],"tags":[],"class_list":["post-9061","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-ky-thuat"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9061","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=9061"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/9061\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=9061"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=9061"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=9061"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}