Ключевые слова: black, clothes, coal, cold, copper, danger, dangerious, dark, deep, dig, dirty, energy, engineering, flashlight, geology, gold, hardhat, hardwork, helmet, history, industrial, industry, instrument, job, laborers, light, male, man, mask, men, metal, metals, mine, miner, mineral, miners, mining, person, physical, portraits, precious, professional, russia, siberia, tunnel, tunneling, underground, uniform, worker, workers,