A.3~4个B.5~6个C.8~9个D.11~12个
A.轴端面B.轴心线C.轴心点D.轴承
A.0.10~2.64m3/minB.0.08~1.90m3/minC.0.08~2.00m3/minD.0.10~1.90rn3/min