Ключевые слова: activity, architect, architecture, building, bulldozer, closeup, construction, contractor, development, digging, dirt, dirty, earth, engineer, engineering, equipment, fuel, generation, ground, hard, hardhat, hat, headwear, helmet, industry, laying, machinery, material, metal, mining, mover, nature, occupation, outdoors, plastic, power, protective, road, safety, sand, site, steel, tool, work, worker, working, workwear, yellow,