1. Cov txheej txheem yooj yim ntawm txoj siv xuab zeb: Sanding siv feem ntau yog tsim los ntawm peb lub ntsiab lus: Cov khoom siv hauv paus, Binder thiab abrasives.Cov khoom siv hauv paus: Ntaub puag, Ntawv puag, Composite puag.Binder: Tsiaj kua nplaum, Semi-resin, Puv resin, Dej-resistant pr ...
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