信号系统 meaning in English

beaconage
signal system
signal sytem
signaling system

Waterflow indicators for fire protective signaling systems
防火信号系统用水流量指示器
Power supplies for fire - protective signaling systems
防火信号系统用电源
Amplifiers for fire protective signaling systems
防火信号系统用放大器
Signal system for urban rail transit - general specifications
城市轨道交通信号系统通用技术条件
Signal system for urban public transportation . light rail transit
城市公共交通信号系统.轻轨交通

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