Ключевые слова: bar, building, closeup, concrete, construction, engineering, firm, footing, foundation, frame, framework, gain, grid, ground, hard, industrial, industry, infrastructure, iron, material, mesh, metal, outdoor, pattern, project, rebar, rectangle, reinforce, reinforcement, reinforcing, rod, rust, rusty, site, square, stack, stacked, steel, strength, strong, structural, structure, supply, support, texture, wire,