Ключевые слова: automatic, auxiliary, cable, changeover, circuit, close, coaxial, coil, communication, component, connect, connection, connector, contact, contactor, control, controlled, device, electrical, electricity, electromagnet, electronic, energy, engineering, equipment, hardware, industrial, industry, machine, magnetic, mechanically, network, object, open, operated, panel, part, plug, power, relay, signal, socket, supply, support, switch, switchboard, system, technology, telecommunication, voltage,