道口: road junction; level crossin ...信号: signal; semaphore; gun指示器: indicator; pointer; director ...信号指示器: signal indicator; signal meter; signalling disc电流信号指示器: curl signal indicator; current signal indicator反射信号指示器: reflected signal indicator; reflected signal indiccator过载信号指示器: overload signal indicator呼梯形信号指示器: tell tall call交流信号指示器: ac indicator旗语信号指示器: flag indicator水位信号指示器: alarm water level位置信号指示器: position signal indicator线路信号指示器: lsi line signal indicator道口信号: grade crossing signal; highway crossing signal道口信号机: grade crossing signal; highway crossing signal; highway level crossing signal; highwaycrossingsignal接收强度信号指示器: rssi色盘降落信号指示器: drop annunciator拔号指示器: dial indicator序号指示器: sequence number indicator道口信号符号: highway crossing signal symbol平交道口信号: rail crossing signal; railroad crossing signal信号指示: singnal顺序号指示器: sequence number indicator等强信号指示: split indication信号指示浮标: signaled indicator buoy
