1.Txhua kom ntxuav kho vajtse kom zoo ntawm cov rooj tog, so nws nrog daim ntaub qhuav lossis phuam so ib ce nrog tus xab npum tsis zoo los yog tshuaj ntxuav tes, thiab thaum kawg so qhuav dej noo.
2. Thaum cov nplaim yog kub hnyav los yog khawb, lossis hlawv ntawm lub foob pob hluav taws, maj mam txhuam lub nplaim nrog cov ntaub thaiv zoo, thiab tom qab ntawd so nws nrog ntaub txhuam.
3. Lub tshuab roj yuav tsum tau siv tas mus li rau cov khoom txav txav chaw txav tau xws li cov ntawv qhia lub pas hlau, uas tuaj yeem txo qhov kev sib txhuam suab ntawm cov khoom kho thiab ua kom ntev lub neej.
4. Zam tsis so lub rooj tog nrog dej. Koj yuav tsum siv cov rooj tog tshwj xeeb tsev ntxhua khaub ncaws lossis tus saib xyuas tsis tu ncua. Nws yog qhov zoo tshaj rau txau cov tshuaj ntxuav rooj tog tshwj xeeb lossis tus saib xyuas ntawm daim ntaub paj rwb huv thiab maj mam so cov hmoov av. Tsis txhob txhuam qhov saum npoo ntawm cov rooj tog kho vajtse fittings nrog cov khoom ntse lossis tawv, thiab tsis txhob kov cov tshuaj xws li hydrochloric acid, ntsev, thiab bittern.
5. Txheeb xyuas qhov khov kho ntawm cov hinges, swb ntu, eccentric qhov chaw thiab lwm yam khoom siv, thiab kho lawv tam sim ntawd yog tias lawv xoob xoob.
6. Huv si cov khoom siv kho vajtse tsis tu ncua, thiab siv qee cov roj nplua nyeem mus rau cov zawv zawg lossis txav chaw tom qab ntxuav.
7. Yog tias koj tuaj yeem' t daws nws los ntawm koj tus kheej, thov sab laj lub tsev muag khoom lossis tshaj tawm txog kev kho.