短語詞組短語traction and power supply 牽引供電traction motor power supply system 牽引電動(dòng)機(jī)供電制式dc traction power supply 直流牽引供電subway traction power supply 地鉄牽引供電traction power supply mode 牽引供電方式traction power supply systems 牽引供電系統(tǒng)traction power supply substation 牽引變電站traction power supply modes 牽引供電方式electric traction power supply 電力牽引供電 返回 traction power supply