track signalled in both directions的意思|示意
美 / /
英 / /
轨道在两个方向都有信号
track signalled in both directions的网络常见释义
双向信号线路 ... In both directions 相向的 track signalled in both directions 双向信号线路 all vehicles prohibited both directions 禁止来往方向的一切车辆驶入 ...