High-speed steel saw hniav, tseem hu ua cua hlau saw hniav, dawb hlau pom hniav, yog ib qho hlau uas muaj cov pa roj carbon ntau (C), tungsten (W), molybdenum (Mo), chromium (Cr), vanadium ( V) thiab lwm yam Hacksaw hniav. High-speed steel raw cov ntaub ntawv muaj siab kub hardness tom qab txiav ...
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