crossing with movable point的意思|示意

美 / / 英 / /

可动点交叉


crossing with movable point的网络常见释义

可动心轨辙叉 ... crossing watchman 平交道看栅工 crossing with movable point 可动心轨辙叉 crossing with movable wing rail 可动翼轨之岔心 ...