Ключевые слова: black, builder, building, coal, coal mine, coal miner, construction, contractor, deputy, dirty, dress uniform, employment, energy, engineer, engineering, feather, foreman, gala, hard, hardhat, hat, helmet, industrial, industry, inspector, laborer, male, man, manufacturing, metallurgist, mine, mine shaft, miner, mineshaft, occupation, parade, polish miner, profession, professional, uniform, white, work, worker,