Cov khoom siv ua kom tawv tawv tawv rau qhov loj-txoj kab uas hla zog

Zuag qhia tag nrho qhov tawv ntawm qhov loj-txoj kab uas hla iav, txuag hluav taws xob thiab txuag hluav taws xob, txheej txheej tawv tawv, tawv tawv, txhim kho kev hnav tsis kam thiab kev pab lub neej ntawm lub iav thaum siv.

Kev tua hluav taws muaj lub suab nrov tshaj tawm suab, thiab txheej txheem quenching yog 1-3 hli. Qhov nruab nrab zaus quenching, quenching txheej 2-6mm.