Ключевые слова: architecture, background, blurred, built, business, cement, concrete, construction, contractor, crane, dawn, development, engineer, engineering, equipment, first, ground, group, hard hat, helmet, high, home, house, housing, industrial, industry, installation, labor, male, man, manual, men at work, occupation, people, person, profession, professional, project, safety, scaffolding, site, steel, structure, teamwork, work,