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.
Hais txog peb
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