Ключевые слова: activity, architecture, background, blue, build, building, built, business, cabin, city, close, concrete, construction, control, crane, cranes, development, engineer, engineering, equipment, frame, growth, heavy, high, house, industrial, industry, iron, lift, lifting, machine, machinery, metal, metal structure, moving, operator, outdoor, project, site, sky, steel, structure, support, tall, technology, tower, up, urban, work, yellow,