Some train travelers at the Beijing West Rail Station say they have been waiting for more than a week to get on a train and return home.
北京西站的一些旅客说，他们为了买到一张回家的火车票已经排队等了一个多星期。
The curvilinear shape of sprocket wheel is the main cause of arching phenomenon of sintering pallets in the return rail.
链轮齿板的曲线形状是造成烧结机台车在回车道上起拱的根本原因。
In DC rail transit systems, the running rails are usually used as the return conductor for traction current.
城市轨道交通的供电系统一般采用直流供电，并以轨道作为回流的通路。
In DC rail transit systems, the running rails are usually used as the return conductor for traction current.
城市轨道交通的供电系统一般采用直流供电，并以轨道作为回流的通路。
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