A.要使用充分的切削液 B.不允許 C.必須手動進給 D.必須采用反切刀切斷法
A.裝低0.2~0.5mm B.裝高0.1~0.25mm C.裝高0.2~0.5mm D.裝低0.1~0.25mm
A.=90° B.>90° C.<90° D.=75°