Ключевые слова: activity, blue, bright, building, business, city, construction, construction equipment, construction industry, crane, cranes, development, engineering, equipment, erection, estate, frame, heavy, high, industrial, industry, korea, lift, lifting, machine, machinery, outdoor, red, silhouette, site, sky, steel, structure, sunrise, sunset, tall, technology, tower, tower cranes, urban, white, work, yellow,