(1) Iṣiṣẹ adaṣe darí didan: jẹ nipasẹ gige, abuku ṣiṣu dada ohun elo ti a yọ kuro lẹhin didan convex ati ọna didan dada, gbogbo epo, kẹkẹ irun-agutan, sandpaper, ati bẹbẹ lọ, ni a fun ni pataki si pẹlu iṣẹ afọwọṣe, awọn ẹya pataki gẹgẹbi bi Rotari dada,...
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