刚性接触网中接触线在锚段末端汇流排外余长为(),沿汇流排终端方向顺延,一般情况对接地体的距离不应小于()。
参考答案:100~150mm;150mm
When and where to build the new factory () yet.
A.is not decided
B.are not decided
C.has not decided
D.have not decided
0,0,6,24,60,120 ( )
A.180
B.196
C.210
D.216