短語詞組短語Signaling collection system 信令采集系統(tǒng)signaling monitor system 信令監(jiān)測系統(tǒng)railway signaling indication system 鐵路信號顯示制式signaling monitoring system 信令監(jiān)測系統(tǒng)signaling protocol system 信令協(xié)議系統(tǒng)signaling g system 信號系統(tǒng)CSCS Common Signaling Channel System 公共信令通道系統(tǒng)voice frequency signaling system 音頻信令系統(tǒng)proprietary signaling system 私有信號系統(tǒng) 返回 signaling system