Dab tsi yog khi hlau:
Mar 28, 2020
Tso lus
Dab tsi yog khi hlau:
Cov xov hlau sib khi yog cov xaim me me siv tau los siv los khi hauv kev tsim kho. Nws yog dav siv hauv kev tsim kho ua haujlwm rau khi lub hom phiaj. ... Lawv tseem muaj lub npe hu ua annealed steel hlau vim tias cov txheej txheem ntawd ua rau lawv muaj zog ntxiv, yoog raws thiab rov siv tau.
