- 搜標(biāo)題
- 搜題干
- 搜選項(xiàng)
單項(xiàng)選擇題
道岔動(dòng)作桿的銷孔曠量應(yīng)不大于（）
A.0.5mm
B.1mm
C.1.5mm
D.2mm
A.0.5mm
B.1mm
C.1.5mm
D.2mm
