单项选择题
A.0.07〜0.16mmB.0.14〜0.28mmC.0.25〜0.38mmD.1〜1.4mm
A.50N •mB.100N •mC.250N •mD.300N •m
A.强制润滑B.压力润滑C.飞溅润滑D.油浴润滑