- 搜標(biāo)題
- 搜題干
- 搜選項
單項選擇題
D7型電動轉(zhuǎn)轍機動作桿行程為（）
A.156±0.5mm
B.156±1mm
C.156±2mm
D.156±3mm
A.156±0.5mm
B.156±1mm
C.156±2mm
D.156±3mm
