Qhov zoo ntawm kev siv hmoov hlau

Tus nqi qis loj ntawm kev tsim khoom zoo, muaj zog qhov chaw.
1. Kev lag luam thiab ib puag ncig huv
2. Khaws qhov ntev ntev, ua tiav "net" shaping
3. Muab lub ntsej muag zoo
4. Tshem tawm lossis txo qis kev ua haujlwm lossis kev sib dhos
5. Muaj ntau yam khoom siv alloyed
6. Muab cov ntaub ntawv uas yuav raug kho kom sov kom muaj zog ntxiv los yog hnav tsis kam
7. Txo cov khoom seem
8.Provides tswj porosity rau nws tus kheej lubricatio

Ua kom yooj yim rau kev tsim cov duab sib txawv lossis cov duab tshwj xeeb uas yuav ua tsis tau lossis ua tsis tau nrog lwm cov txheej txheem hlau