Ключевые слова: adult, background, cable, checking, connection, control, distribution, electric, electrician, electricity, engineer, engineering, equipment, examining, expertise, foreman, gear, grid, hard, hardhat, helmet, horizontal, improvement, indoors, industrial, industry, job, labor, network, occupation, one person, people, persons, plan, pole, power, profession, professional, protection, safety, service, skill, sky, station, tablet, worker,