Ключевые слова: activity, architecture, armature, background, bar, build, builder, building, bunker, business, cement, cementing, closeup, concrete, concreting, construct, construction, contractor, corrosion, design, engineering, equipment, foundation, frame, framework, grid, house, industrial, industry, iron, job, machinery, material, metal, new, pattern, rebar, reinforced, reinforcement, rod, rust, safety, site, steel, strong, structure, tool, wire, work, worker,