研究方法：通过对接触网承力索的现状和主要防磨损措施的研究来进行分析。

Research methods:The analysis is made for the present situation of catenary of overhead contact wire system and main measures against wear of it.

youdao

研究方法：通过对接触网承力索的现状和主要防磨损措施的研究来进行分析。

Research methods:The analysis is made for the present situation of catenary of overhead contact wire system and main measures against wear of it.

youdao