1. Txhaj cov khoom siv moulding. Cov khoom siv muaj impurities lossis cov neeg xa khoom sib txawv' muab, ntau pawg ntawm cov chaw tsim khoom qub, thiab lwm yam Kev siv tshuab ua yog txawv.
2. Txhaj tshuaj tshuab. Txheeb xyuas seb qhov haujlwm ntawm ntau qhov chaw ntawm lub tshuab txhaj tshuaj yog qhov qub, thiab xav txog qhov cuam tshuam ntawm kub, siab, lub sijhawm, thiab lwm yam, thiab tswj thiab kho lub tshuab txhaj tshuaj.
3, pwm. Cov cuab yeej siv pwm yuav tsum yog qhov tsim nyog, qhov ntsuas kub yuav tsum yog, thiab cov txhaj tshuaj pwm yuav tsum khiav zoo nyob rau hauv pwm.
4. Cov txheej txheem ntau lawm. Yuav kom ntseeg tau tias lub siab, qhov kub thiab lub sijhawm ua tau raws li cov kev ua haujlwm tau muab los ntawm cov khoom xa khoom, ntsuas xyuas lub nrawm nrawm thiab qhov tseeb ntawm cov thev naus laus zis.
5, lub sijhawm txhaj tshuaj, ntsuas kub, siab, thim rov qab tuaj yeem cuam tshuam qhov zoo ntawm cov yas ua khoom noj.https://www.fhpails.com/
