Ключевые слова: background, board, breaker, button, check, circuit, closeup, commercial, commissioning, connect, connecting, construction, control, current, design, digital, electric, electrical, electrician, electricity, electronic, energy, engineer, engineering, equipment, factory, fuse, hand, hands, industrial, installation, machine, maintenance, man, measurement, object, operator, person, plug, power, professional, protection, relay, repair, repairman, s, safety, security, service, stop, supply, switch, switchboard, switchgear, symbol, system, tech, technical, technician, technology, terminal, test, tool, tools, voltage, wattage, wire, wiring, work, worker,