Ключевые слова: activity, architecture, background, builder, builders, building, business, cement, concrete, construction, contractor, craftsman, demolition, electric, engineering, equipment, hammer, helmet, high rise, home, house, industrial, industry, job, machine, machinery, maintenance, male, man, management, people, professional, project, safety, site, technology, tool, wall, white, work, worker, workers, working, workman,