(1) phau ntawv ua haujlwm txhua yam polishing: yog los ntawm kev txiav, cov khoom siv saum npoo yas deformation tshem tawm tom qab polishing convex thiab du nto polishing txoj kev, feem ntau siv roj, ntaub plaub log, ntawv xuab zeb, thiab lwm yam., yog muab qhov tseem ceeb rau kev tuav haujlwm, tshwj xeeb qhov chaw xws li Raws li rotary nto, ...
Nyeem ntxiv