Ib daim duab piav qhia txog txoj kev tawv

Ntawm no yog ib daim duab los muab rau koj ncaj qha sib piv ntawm lub hardness thiab txheej qhov tob uas tuaj yeem ua tiav siv cov kev sib txawv saum npoo av, nrog rau kev mob carburizing, thiab induction hardening.(文章来源: Imchanics 机械)