Ключевые слова: activity, architecture, background, blue, building, built, business, city, color, concrete, construction, crane, development, engineering, equipment, estate, frame, growth, heavy, high, housing, industrial, industry, iron, machine, machinery, manual, occupation, outdoor, people, profession, project, real, scaffolding, silhouette, site, sky, steel, structure, sun, sunlight, sunrise, sunset, technology, tower, urban, view, work, worker, yellow,