contact rail meaning in English

导电轨
接触轨

Current collector for contact rail ; main dimensions
接触轨的集电器.主要尺寸
Steel conductor contact rails for electric traction ; technical conditions of delivery
电气牵引用钢制导线接触轨.交货技术条件
To supplement his viewpoint , the author finally introduces the characteristics of the aluminum alloy contact rail
最后对钢铝复合接触轨的特性作了介绍。