They are used in railway systems of mechanical interlocking (SZhDM 1), in railway traffic lights of electric centralization (SZhDM 1) and on access roads of industrial enterprises (ZhSM 1)
They are used in railway systems of mechanical interlocking (SZhDM 1), in railway traffic lights of electric centralization (SZhDM 2P) and on access roads of industrial enterprises (ZhSM 2)
To create a light signal in the form of a green rectangle indicating the value of the train speed when receiving on the side path
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