Ключевые слова: activity, apartment, architecture, background, blue, building, buildings, built, business, cement, civil, concrete, construction, crane, cranes, development, district, engineering, equipment, exterior, frame, gray, heavy, high, hoist, hoisting, home, house, housing, industry, iron, isolated, machine, machinery, metal, picking, reinforcement, residential, roof, scaffolding, set, site, sky, steel, structure, tall, tower, urban, white, yellow,