Tempering
Tempering, nyob rau hauv metallurgy, txheej txheem ntawm kev txhim kho cov yam ntxwv ntawm ib tug hlau, tshwj xeeb tshaj yog steel, los ntawm cua sov nws mus rau ib tug kub kub, txawm nyob rau hauv lub melting point, ces txias nws, feem ntau yog nyob rau hauv huab cua.
Txog Peb
Koj email chaw nyob yuav tsis tsum luam tawm. Yuav tsum tau teb cov cim nrog *