Kev tu
1.Tsis txhob txiav cov pob txha lossis cov zaub mov tawv (pob txha, zaub mov qhuav, khoom noj khov, cov txiv ntoo, thiab lwm yam), thiab cov khoom noj khov yuav tsum tau thawed ua ntej txiav.
2.Tsis txhob nplawm txhua yam nrog cov hniav. Tsis txhob txiav cov zaub mov ntawm cov khoom tawv. (iav, ceramic, hlau phaj thiab pob zeb phaj, thiab lwm yam).
3.Tsis txhob kov cov tshuaj corrosive thiab hydrochloric acid thiab kom deb ntawm qhov hluav taws kub. Tsis txhob ntub los yog ntxuav hauv dej ntsev. Tom qab txhua qhov kev siv, thov ntxuav nrog dej, qhuav nws, thiab muab tso rau hauv qhov chaw qhuav thiab qhov cua.
4.Yuav kom muaj kev ua tau zoo dua, thov xaiv ntau hom riam rau txiav cov khoom noj sib txawv.
5.Yog rab riam yog npub, thov siv cov whetstone kev sib tsoo. Qhov no tuaj yeem ua rau lub neej ntev ntawm koj rab riam.
6.Thov nco ntsoov tias tag nrho qhov ntev yog ntsuas manually, thiab qhov yuam kev yog nyob rau hauv 1-2 hli.










