短語(yǔ)詞組短語(yǔ)railway fsk signal 車載fsk信號(hào)railway digital signal cable 鉄路數(shù)字信號(hào)電纜Railway communication signal 鉄道通信信號(hào)railway y signal 鉄路信號(hào)railway station signal equipment 車站信號(hào)設(shè)備railway fire signal 鉄路火警信號(hào)railway station signal equipments 鉄路車站信號(hào)設(shè)備railway cab signal 機(jī)車信號(hào) 返回 railway signal