CRH2C二级修GFX感应接收器底边距轨面高度( )mm

CRH2C二级修GFX感应接收器底边距轨面高度( )mm

A.110(0,+20)

B.110(0,+21)

C.110(0,+22)

D.110(0,+23)

正确答案是A