Ключевые слова: activity, architecture, background, blue, build, business, cable, city, civil, closeup, construction, crane, development, engineering, equipment, frame, heavy, high, hoisting, industrial, industry, large, lift, line, load, machine, machinery, metal, modern, nobody, object, part, place, project, railing, safety, site, sky, steel, structure, tall, technology, top, tower, transportation, urban, vertical, winch, working, yellow,