问题:
[名词解释] 混合铁路枢纽 combined railway terminal
问题:
[名词解释] 联络线 connecting line
问题:
[名词解释] 直径线 diameterical line
问题:
[名词解释] 环线、半环线 loop,half-loop
问题:
[名词解释] 平面疏解 plane-untwining
问题:
[名词解释] 立体疏解 vertical-untwining
问题:
[名词解释] 方向别疏解 untwine of direction
问题:
[名词解释] 线路别疏解 untwine of main line
问题:
[名词解释] 列车别疏解 untwine of train