Ключевые слова: abstract, assembly, background, building, close, companies, company, concrete, construction, cover, dangerous, fence, firm, flower, foundation, gain, grunge, houses, iron, joint, machine, mesh, pattern, pile, protect, raw, rebar, reinforce, reinforcing, rust, rusty, same, shell, similar, site, square, stack, stacked, steel, strong, structural, supplies, technology, texture, tunnel, uniform, up, water, weathered, wire,