?线路中央线
...警冲标 fouling point indicator;fouling post 线路中央线 track center line;central lines of track 线间距离 ;线间距 distance between centres of lines;distance between centers of tracks;midway between tracks ..
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。