Ключевые слова: architecture, background, blue, build, business, city, concrete, construction, copy, crane, derrick, development, elevator, engineering, equipment, frame, heavy, high, hoist, hook, housing, industrial, industry, iron, lift, lifting, machine, machinery, metal, observatory, orange, outdoor, platform, rent, scaffolding, site, sky, skyscraper, space, steel, strength, structure, sun, technology, tower, transportation, urban, wire, work, yellow,