Ключевые слова: background, black, cavern, coal, construction, craft, dark, dirty, dust, employment, energy, engineering, face, foreman, grime, hard, hard hat, hardhat, hat, head, heat, helmet, industrial, industry, job, labor, laborer, machinery, male, man, manufacturing, men, metallurgist, metallurgy, mine, miner, occupation, occupational, one, people, person, portrait, profession, quality, safety, soot, space, white, work, worker,