Ключевые слова: activity, architecture, blue, building, closeup, coal, construction, danger, development, digging, dirt, dirty, earth, engineer, engineering, equipment, factory, fuel, generation, hard, hardhat, hat, headwear, helmet, industry, laying, machinery, material, men, metal, miner, mining, mover, mud, nature, occupation, outdoors, power, protective, safety, site, sports, steel, tool, work, worker, working, workwear,