Railway system: railway signal room, railway locomotive, Electric power substation alongside railway, Generator car with air-conditioner.

铁路系统：铁路信号房(楼)、铁路机车、铁路沿线变电所、空调发电车等。

youdao

Railway system: railway signal room, railway locomotive, Electric power substation alongside railway, Generator car with air-conditioner.

铁路系统：铁路信号房(楼)、铁路机车、铁路沿线变电所、空调发电车等。

youdao