1. Peb tuaj yeem siv daim ntaub qhuav los so cov roj av me me, thiab tom qab ntawd so cov thoob yas yas dua. Tom qab ntxuav tag, nco ntsoov ntxuav nws nrog dej.
2, koj tuaj yeem hno cawv ntawm cov xim, thiab tom qab ntawd so nws nrog daim ntaub maj.
3. Ntau tus ntxhais nyiam ua cov ntsia hlau tom tsev. Peb tuaj yeem siv cov ntsia hlau ntxuav cov xim tshem tawm kom tshem tawm cov xim. Cov txheej txheem tshwj xeeb yog los so cov xim nrog paj rwb pas nrig hauv cov ntsia hlau ntxuav cov ntsia hlau, kom nws tuaj yeem tshem tawm sai.
4. Txhuam cov xim pleev xim rau ntawm cov xim, txhuam nws ob peb zaug, cov xim ntawm lub thoob yas yuav cia li txhuam, txhuam tawm cov xim qub, thiab tom qab ntawd ntxuav nws nrog dej.
5. Koj tuaj yeem so cov xim nrog epoxy thinner, yog li nws yuav xoom tawm.
6. Koj tseem tuaj yeem tsau lub alkali nrog dej npau npau. Thaum dej kub, thov nws pleev xim rau saum npoo nrog txhuam. Cov xim pleev xim yuav sai sai, thiab tom qab ntawd nws tuaj yeem ntxuav ntxiv nrog dej tom qab nws txhuam nws.
7. Ntxiv rau, peb tuaj yeem so nrog caustic soda solution.https: //www.fhpails.com/
