Round steel induction cua sov quenching thiab tempering ntau lawm kab

Round steel induction cua sov thiab quenching thiab tempering ntau lawm kab tsim thiab tsim rau cov neeg siv tau sim tag nrho cov ntsuas nyob rau hauv ib lub sij hawm, thiab txawm ib co tsis tau tshaj tus txheej txheem kev lag luam, xav txog qhov zoo meej ua ke ntawm Songdao tsim thiab teb kev!