- 搜標(biāo)題
- 搜題干
- 搜選項(xiàng)
單項(xiàng)選擇題
5機(jī)牽引電液轉(zhuǎn)轍機(jī)尖1表示桿動(dòng)程為（）.
A.110mm
B.140mm
C.150mm
D.160mm
