Thaum xaiv cov chaw tsim khoom ferrosilicon granule, muaj ntau yam los xav txog kom ntseeg tau tias koj xaiv tus neeg muag khoom zoo.Clarify xav tau Ua ntej, qhia meej koj cov kev xav tau tshwj xeeb rau ferrosilicon granules, nrog rau cov lus qhia tshwj xeeb, zoo, ntau, tus nqi thiab tus me nyuam ...
Nyeem ntxiv