Ключевые слова: adults, business, cable, checking, construction, control, electric, electrical, electrician, electricity, electronic, energy, engineer, engineering, equipment, examination, factory, helmet, indoors, industrial, industry, inspector, installing, job, maintenance, man, manufacturing, occupation, office, panel, people, power, professional, protection, repair, safety, switch, switchgear, system, technical, technician, technology, voltage, work, working,