conductor rs valve

英 美
  • 车长阀,紧急制动阀
  • conductor n.售票员;导体;指挥
  • rs abbr.无线电台(=RadioStation)abbr.继电器式选择器(=RelaySelector)abbr.反转信号(=ReverseSignal)
  • valve n.瓣膜;真空管;阀门;电子管