Tsev / Cov khoom lag luam cim npe "high zaus annealing ntsia liaj qhov rooj shafts" Default sorting Tsi yog tej chaw Tsi yog qhov tseeb Tsi yog nqe: tsis rau siab Tsi yog nqe: yuav tsis tshua muaj Induction Txoj Kev Tig Nem Bolt