A.小徑 B.大徑 C.中徑 D.平均直徑
A.要不斷地加冷卻潤滑劑 B.可以干鉸 C.要加乳化液進(jìn)行冷卻 D.要加注礦物油
A.0.05~0.15mm B.0.15~0.30mm C.0.20~0.25mm D.0.25~0.40mm