Ключевые слова: activity, architecture, background, blue, build, business, cargo, city, cityscape, construction, crane, danger, development, economy, engineering, equipment, growth, hanging, heavy, high, hoist, hydraulic, industrial, industry, iron, machine, machinery, mechanical, metal, object, operating, place, profession, progress, project, safety, section, site, sky, steel, structure, tall, technology, tower, urban, winch, wire, work, workplace, yellow,