welding
Vuam yog sib txuas ntawm ntau cov khoom ua ke kom tiav cov hom phiaj ntawm kev ua los yog sib tshooj ntawm ib sab ntawm ib qho kom nws lub zog. Cov ua ob tog feem ntau muaj CO2 roj thaiv cov hlua, cav arc welding, chaw vuam siv, neeg hlau vuam thiab lwm yam. Kev xaiv ntawm txoj kev siv welding yog raws li cov kev xav tau thiab cov khoom siv.
