![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
线岔两工作支中任一工作支的垂直投影距另一股到线路中心()mm的范围内为始触区,在该范围内不得安装任何线夹
A.550-800
B.550-600
C.560-700
D.250-500
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
A、550-800
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.550-800
B.550-600
C.560-700
D.250-500
A、550-800
A.400~850mm
B.550~950mm
C.600~1050mm
A.600~1050mm
B.700~1050mm
C.600~1000mm
D.500~1050mm
A.550-800
B.550-1085
C.600-1050
D.500-1085