Cov lus qhia rau kev siv cov ntawv xuab zeb

Thaum siv cov ntawv xuab zeb, qhov saum npoo yuav tsum tau khaws cia kom ntub kom tag nrho siv cov nyhuv polishing ntawm cov ntawv xuab zeb. Thaum polishing, tuav ib qho kev taw qhia kom tsis txhob khawb. Rau thaj tsam loj polishing, siv cov xuab zeb siv tshuab lossis tshuab hluav taws xob polishing tuaj yeem siv los txhim kho kev ua haujlwm.