Ключевые слова: abstract, activity, architecture, background, bars, build, building, built, business, cement, characteristics, city, concrete, construct, construction, contruction, crane, design, development, element, engineering, equipment, frame, framework, heavy, house, industrial, industry, iron, large, machine, material, mesh, metal, modern, new, reinforcement, rod, rusty, safety, site, steel, structure, technology, urban, why, work, worker, working,