Ключевые слова: architecture, blue, building, business, city, climb, climbing, company, concept, concrete, construction, contractor, crane, danger, dangerous, development, employment, engineer, equipment, estate, exterior, facility, group, high, highrise, housing, industrial, industry, job, maintenance, manufacturing, men, occupation, outside, people, project, property, risk, rope, safety, scaffolding, service, site, sky, skyscraper, structure, tower, work, worker, workers,