9 Blank magnetic data carriers; signs, luminous; transmitters of electronic signals; magnetic wires; electromagnetic coils; amplifiers; variometers; blank magnetic discs; magnetic coils; distribution boxes for electrical power; commutators; current rectifiers; relays, electric; inverters for power supply; electric voltage transformers; current transformers; electric capacitors for telecommunication apparatus; transformers; sensors for the determination of temperatures, positions and distances; voltage stabilizing power supply; low-voltage power supplies; magnetic cores; coils, electric; capacitors; electromagnets; magnets; electric transformers.