Ключевые слова: activity, apartment, architecture, background, berlin, blue, build, business, cement, city, concrete, construction, crane, development, district, engineering, equipment, estate, europe, exterior, frame, growth, high, home, housing, industrial, machine, metal, modern, new, outdoor, project, residential, scaffolding, site, sky, skyscraper, steel, structure, tall, technology, tower, under, urban, work,