Ключевые слова: activity, adult, african, american, architect, architecture, background, black, builder, building, business, clothing, construction, contractor, development, employee, engineer, equipment, examining, expertise, foreman, frame, goggles, happiness, hardhat, helmet, housing, industry, installing, job, man, multiracial, occupation, people, person, portrait, professional, protection, protective, repairing, safety, scaffolding, smiling, technician, tool, uniform, work, worker, working, young,