A.70% B.75% C.80% D.85%
A.5~10mm;10~15mm B.10~15mm;5~10mm C.8~10mm;3~5mm D.3~5mm;8~10mm
A.用砂紙打磨 B.用刮刀刮削 C.用手提砂輪打磨 D.在立車上用偏心法加工