Low-voltage power supply; [ telephone sets; ] electric switches; [ electric wires and cables; modems; ] photoelectric switches; electricity reducers in the nature of voltage regulators for electric power; apparatus for the transmission of communications; stabilized voltage power supply; [ automatic time switches ]
Low-voltage power supply; [ telephone sets; ] electric switches; [ electric wires and cables; modems; ] photoelectric switches; electricity reducers in the nature of voltage regulators for electric power; apparatus for the transmission of communications; stabilized voltage power supply; [ automatic time switches ]
Low-voltage power supply; [ telephone sets; ] electric switches; [ ele...