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Arrangement for the remote control and monitoring of electrical apparatus and power supply units, in particular the very - and one-half the night circuit of the street lighting by means of a remote switching impulse transmission in the three-phase mains power supply wire by means of brief
Arrangement for the remote control and monitoring of electrical apparatus and power supply units, in particular the very - and one-half the night circuit of the street lighting by means of a remote switching impulse transmission in the three-phase mains power supply wire by means of brief
