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Advertisement system for suburban trains has screens and loudspeakers with automatic control and a centralised signals reproducer
Advertisement system for suburban trains has screens and loudspeakers with automatic control and a centralised signals reproducer
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机译:用于郊区火车的广告系统具有带自动控制功能的屏幕和扬声器以及集中的信号再现器
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摘要
The advertisement system for suburban trains includes screens (3) and loudspeakers (4) with an automatic control compensator. Signals reception is via radio frequency or via metal leads. EMBODIMENT - The signalling leads have an audio-visual signal reproducer (2) common to all the trains.
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