Ключевые слова: adult, caucasian, construction, efficiency, engineer, engineering, equipment, expertise, facility, factory, foreman, fuel, generation, hard, hardhat, hat, helmet, industrial, industry, looking, machinery, males, man, manager, manufacturing, men, metal, night, occupation, oil, one, outdoors, person, power, professional, protective, refinery, safety, site, skill, standing, steel, structure, technology, work, worker, working, workwear,