1. Cov pwm
Cov pwm ua haujlwm rau precision khoom siv kho tshuab. Nws yog ib qho tseem ceeb ntawm cov khoom siv tshuab thiab cov tshuab, xws li tsim cov khoom ua haujlwm, cov lus qhia ua haujlwm, cov khoom txhawb nqa, cov chaw tso, cov khoom noj, cov tub ntxhais rub tawm tshuab thiab cov tshuab thawb.
Thaum txhaj pwm siv nrog cov khoom siv sib xyaw moulding (xws li xuas nrig ntaus tshuab, yas txhaj tshuaj moulding tshuab, tuag casting tshuab, thiab lwm yam), cov duab, qhov loj me, kev txheeb ze qhov chaw thiab kev ua haujlwm ntawm cov hlau lossis cov khoom tsis yog hlau tuaj yeem hloov ncaj qha ua ib qhov haum tsim nyog.
2.Qhov kev faib tawm ntawm cov pwm
Feem ntau hais lus, cov pwm tuaj yeem muab faib ua ob pawg: cov khoom siv hlau ua qhov tsim pwm, xws li tuag, forging tuag, tuag-casting pwm, thiab lwm yam; cov khoom uas tsis yog xim hlau los ua pwm, xws li yas txhaj tshuaj pwm, tuag pwm tuag thiab txhaj tshuaj txhaj tshuaj pwm, roj hmab ntu, iav qhov chaw thiab qhov chaw tuaj ua pwm.
Muaj ntau ntau hom kev cais tshwj xeeb rau cov pwm. Cov khoom siv dav dav siv: raws li daim ntawv ua qauv pwm, cov tuag tuaj yeem muab faib ua cov txheej txheem ib leeg tuag, kev sib txuas tuag, kev tuag sai, thiab lwm yam; yas tuag tuaj yeem muab faib ua ib ntu yas pwm, ob tog yas yas thiab lwm yam. Raws li qhov xwm txheej ntawm cov txheej txheem, cov tuag tuaj yeem muab faib ua tus xuas nrig ntaus tuag, tus tuag pam tuag, kos duab tuag, thiab khoov tuag; cov yas tuag tuaj yeem muab faib ua lub ntsej muag tuag, nias tuag, txhaj tshuaj tuag, thiab cov zoo li.