1. Cov khoom xaiv
Thawj kauj ruam hauv kev ua ib lub hollow cib pwm yog xaiv cov khoom siv tau. Cov khoom siv yuav tsum tau muaj thauj khoom -} Cov kabmob muaj peev xwm thiab hnav thiab corrosion tsis kam. Cov ntaub ntawv cov khoom siv muaj cov ntoo ntoo, cov phiaj hlau, thiab lwm yam.
2. Ntsuas
Ntsuas cov nyiaj yuav tsum tau loj thiab khij nws raws li qhov loj me ntawm cov cib thiab cov duab ntawm cov pwm.
3. Txiav
Siv cov hniav pom lossis hluav taws xob pom txiav cov txiag tsim nyog raws li cov cim cim. Them sai sai rau kev nyab xeeb thiab hnav cov khoom tiv thaiv tiv thaiv.
4. Splicing
Splice tus txiav cov laug cam raws li cov qauv tsim nyog. Siv cov ntsia hlau, kua nplaum thiab lwm yam cuab yeej los kho lawv.
5. Kho
Txheeb xyuas qhov loj me thiab huv ntawm cov pwm, kho txoj haujlwm ntawm cov txiag tswj hwm thiab txoj kev sepicting ua kom cov pwm kom raug thiab ruaj khov.
6. Kev tsim kho
Tshawb xyuas ua ntej kev tsim kho kom ntseeg tau tias cov pwm tsis muaj qhov tsis pom zoo lossis deformation. Thov roj hauv pwm thiab muab cov hlau nplaum hlau. Tom qab pouring pob zeb ua, cia nws ua kom tiav.
7. Tiv Thaiv
Tom qab cov pob zeb ua yog qhuav qhuav, tshem tawm cov pwm. Them sai sai rau kev nyab xeeb thiab zam kev ua kom muaj pwm thiab qhob.
8. Txij Nkawm
Tom qab siv, ntxuav cov pwm nyob hauv lub sijhawm thiab coj txij nkawm xws li hmoov av thiab noo kev tiv thaiv kom paub meej thiab lub neej ntawm cov pwm.