existing main lines的意思|示意
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现有主线
existing main lines的网络常见释义
既有铁路干线 ... 铁路干线机车 railway trunk line locomotive ; main-line locomotive 既有铁路干线 existing main lines 铁路干线列车 main line train ...
existing main lines相关例句
The main safety problems existing in the system of passenger combined transport in dedicated lines and their causes are systemically analyzed.
系统分析了客运专线联合运输存在的主要安全问题及其产生原因。