单项选择题
A.管子卡盘B.板牙刀C.进刀手轮D.割刀架
A.1/2~2inB.1/2~3inC.1/2~4inD.1/2~6in
A.D=DPB.D=D+PC.D钻=D-PD.D=D-P÷D
A.20#B.25#C.30#D.45#
A.盲孔B.通孔C.内孔D.外圆
A.0.1047rad/sB.0.1667rad/sC.6.2831rad/sD.0.1591rad/s
A.光闪式转速表B.电频闪式测速仪C.频闪式转速表D.光频闪式测速仪
A.转速挡B.表盘C.放大倍数D.减小系数
A.周期B.效率C.速度D.距离
A.0.5hB.1hC.1.5hD.2h
A.40kPaB.30kPaC.20kPaD.10kPa