Ключевые слова: american, architect, background, builder, caucasian, construction, contractor, control, engineer, equipment, factory, foreman, hard hat, heavy, helmet, industrial, inspector, job, looking at camera, machine, maintenance, male, man, manufacture, manufacturing, mechanic, men at work, occupation, people, person, pipes, portrait, production, profession, professional, protection, safety, technician, technology, tool, uniform, worker, working man, workplace,