Dab tsi yog Abrasion Resistant Steel

Lub ntsiab lus dav dav rau cov ntaub ntawv hlau uas muaj zog hnav tsis kam, hnav- cov hlau tsis muaj zog yog cov khoom siv dav siv ntau tshaj plaws - cov khoom siv tiv taus niaj hnub no.