Ключевые слова: builder, builders, building, cement, civil, concrete, construct, construction, contractor, development, engineer, engineering, equipment, foundation, framework, hard, hat, heavy, helmet, house, industrial, industry, iron, man, manual, material, metal, people, pillars, rebar, reinforce, reinforced, reinforcement, reinforcing, rod, safety, site, steel, structure, tool, wire, work, worker, workers,