Ключевые слова: architect, architecture, background, build, building, business, civil, construction, contractor, crane, design, developer, development, employment, engineer, engineering, equipment, estate, hard, hardhat, hat, headgear, health, healthy, helmet, home, house, housing, industrial, industry, job, maintenance, professional, project, property, protect, protective, real, residential, safe, safety, security, site, structure, tool, work, worker, workman, workplace, yellow,