Qhov twg yog qhov zoo dua, dej xuab zeb lossis ntawv xuab zeb qhuav?

Muaj ntau qhov sib txawv ntawm cov ntawv xuab zeb thiab cov ntawv xuab zeb qhuav, tab sis tsis muaj ib qho zoo li cov ntawv xuab zeb zoo. Qhov kev xaiv tsuas yog raws li cov khoom sib tsoo thiab cov kev xav tau ntawm txoj haujlwm.

Yog tias koj xav tau ib qho smoother tiav, thiab koj tsis mloog qhov kev sib tsoo qeeb, nws yog qhov zoo dua los siv cov ntawv xuab zeb dej; Yog tias koj xav tau cov ntaub ntawv ntau thiab xav tau ceev ceev, nws raug nquahu kom siv cov ntawv xuab zeb qhuav, lossis cov ntawv xuab zeb qhuav ua ntej. Tom qab ntawd grind nrog dej sandpaper.