Tus yuam sij rau kev sib tw khiav hurdle yog dab tsi?

Tus yuam sij rau kev sib tw hurdling yog kom ua sai, uas yog khiav sai, thiab ua kom tiav cov kev sib tw hurdling sai.

Koj puas tseem nco qab thaum Liu Xiang yeej qhov kev sib tw khiav 110-meter ntawm xyoo 2004 Olympics? Nws tseem zoo siab heev thaum xav txog nws.

Kev sib tw khiav hla qhov rooj tau pib hauv tebchaws Askiv thiab tau hloov zuj zus los ntawm kev ua si uas cov neeg yug yaj hla cov laj kab. Nws raug hu ua qhov chaw sib tw thiab yog ib feem ntawm kev ua si ntawm cov txiv neej. Cov laj kab thaum ntxov yog cov laj kab ib txwm muaj. Tom qab ntawd los txog cov laj kab uas faus rau hauv av, thiab tom qab ntawd cov chaw txiav ntoo. Kev dhia hla cov laj kab no yog qhov txaus ntshai, ua rau raug mob thiab cuam tshuam kev txhim kho cov txuj ci khiav hla qhov rooj.

Yog li ntawd, thaum pib ntawm lub xyoo pua 20th, muaj ib hom kev sib tw "orthogonal" uas txav tau, uas txhawb nqa kev txhim kho thev naus laus zis. Xyoo 1935, cov duab "L" ntawm qhov kev sib tw tau qhia, thiab qhov kev sib tw yuav tig mus tom ntej ntawm plaub kilograms ntawm lub zog cuam tshuam. Cov qauv "L" zoo li tus qauv tsim nyog dua thiab muaj kev nyab xeeb dua, tau siv niaj hnub no.

Sqee cov luavkev sib twcov teeb meemrau txhua tus.

* Qhov siab kho tau, 5 ntu, 762,840,914,1000,1067 hli

Lub hauv paus yog qib siab txhuas square tube

* Crossbar Cov khoom siv ABS ua si zoo heev

Tom qab qib siab txhuas square raj

* Qhov chaw Anodized, ruaj khov, kev tiv thaiv ib puag ncig, tiv thaiv acid, tiv thaiv ntub dej