英语词汇traction return current rail怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	traction return current rail
释义	traction return current rail 简明释义牵引回流轨双语例句 1 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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