Cov txheej txheem dav dav yog siv dav hauv kev kho tsheb ceev, mining, metallurgy, nkoj tsim, hluav taws xob fais fab, kev sib txuas lus, hluav taws xob thiab lwm yam lag luam, ua tiav kev teeb tsa, nqa tau yooj yim.
Tam sim no, cov ntsia hlau sib tw nrog cov cuab yeej teeb tsa hauv kev lag luam yog tag nrho ua los ntawm 6150 chrome vanadium hlau, thiab cov wrenches, pliers, rauj, thiab lwm yam yog forged, thiab lub thawv yas kuj yog ib qho khoom siv zoo nkauj.
