Ключевые слова: african, african culture, african ethnicity, black, business, coal, coal mine, coal miner, construction, construction machinery, construction worker, coveralls, dark, earth mover, employee, engineer, engineering, equipment, factory, female, geology, hardhat, heavy, helmet, industrial, industry, job, machine part, machinery, metal, mine, miner, mineral, mining, occupation, oil, power, production, professional, safety, tunnel, underground, uniform, vehicle, woman, work, worker,