Ключевые слова: board, box, builder, cabinet, cable, cabling, checking, connecting, construction, control, current, electric, electrical, electrician, electricity, engineer, engineering, equipment, factory, industrial, industry, installation, installing, maintenance, man, measure, measurement, operator, panel, power, professional, protection, relay, repair, repairman, safety, service, services, supply, switch, switchgear, system, technician, technology, test, tool, voltage, wiring, work, worker,