1. Mechanical Polishing Mechanical polishing ni lati gbekele lori gige, ṣiṣu abuku ti awọn dada ti awọn ohun elo lati yọ awọn convex apa ti awọn didan dada ati ki o gba a dan dada polishing ọna, gbogbo lilo epo okuta awọn ila, irun wili, sandpaper, ati be be lo. , nipataki ti a fi ọwọ ṣiṣẹ,...
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