Ключевые слова: activity, architecture, bar, blue, build, cement, concrete, construct, construction, development, engineering, equipment, floor, foundation, hard, hardhat, hat, heavy, helmet, high, industrial, industry, iron, material, metal, new, pattern, pile, plate, reinforce, reinforcement, rod, rough, rust, rusty, safety, site, steel, strength, structure, technology, texture, urban, work, worker, yellow,