1. Txheeb xyuas qhov ncaj ntawm cov yeeb nkab hlau kom zoo zoo, ua kom ntseeg tau tias cov yeeb nkab hlau tau sib chwv nrog lub cev ncaj rau peb lub hlis twg thaum lub sijhawm hloov kho thawj zaug, thiab xyuas kom qhov sib txawv tsis ntau dua 0.1 hli.
2. Qhov ncaj ncaj yuav tsum tau hloov kho kom haum raws li qib kev khoov ntawm cov yeeb nkab steel thiab cov khoom ntawm cov yeeb nkab steel tau ua ncaj.
3. Kho qhov nrug nruab nrab ntawm cov menyuam sab saud thiab qis dua raws li cov khoom siv, qhov nkhaus thiab xav tau qhov tseeb ntawm cov yeeb nkab steel kom ntseeg tau tias qhov ncaj ncaj txo.
4. Nws yog txwv tsis pub kov cov menyuam ncaj thiab cov yeeb nkab steel nyob rau hauv cov lus tsa suab thaum txheej txheem txheej txheem txheej txheem, thiab ua tib zoo saib xyuas qhov zoo ntawm cov yeeb nkab hlau txhawm rau tiv thaiv cov hlau ntawm cov yeeb nkab los ntawm khawb thiab nkag mus.
