2) underground rail
地下轨道交通
1.
Scale analysis on CBD synthesis development of underground rail;
基于CBD的地下轨道交通综合开发规模分析
3) underground railway track
地下铁路轨道
4) track settlement
轨道下沉
1.
In order to comprehend the occurring and growing mechanism of track settlement,ballast bed settlement was regarded as study object,and the effects of transportation conditions and track structure parameters on ballast settlement were analyzed by using simulation analysis program based on vehicle-track coupling dynamics and track settlement laws.
为理解轨道下沉变形产生与发展机理及主要影响参数,以道床下沉为例,运用车辆-轨道耦合动力学理论和轨道下沉变形法则,借助已开发的仿真分析程序,分析了运营条件与轨道结构参数对道床下沉变形的影响。
5) Tunnel under railway
轨下隧道
6) sunken track
低下轨道
补充资料：轨道保持(见航天器轨道控制)
轨道保持(见航天器轨道控制)
orbit keeping
guidQo baoehi轨道保持(o rbit keePing)见航天器轨道控制。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条