Cov ntsia hlau yog cov khoom siv kho vaj tse nrog ntau yam kev siv, tshwj xeeb tshaj yog nyob rau niaj hnub no kev tsim kho kev lag luam, ntau cov ntsia hlau steel yog xav tau los ua cov cuab yeej ua haujlwm, yog li tsim cov ntsia hlau steel kom zoo, tsim nyog thiab pheej yig yuav tsum muaj cov txheej txheem compact tag nrho, kev tshawb fawb. ...
Nyeem ntxiv