Ключевые слова: adult, background, black, business, cheerful, coal, construction, craft, dirty, dust, employment, energy, engineer, face, foreman, grime, hard, hard hat, hardhat, hat, head, headwear, helmet, industrial, job, machinery, male, manufacturing, men, metallurgy, mine, miner, occupation, one, one person, only men, person, portrait, profession, professional, protective, safety, smiling, soot, work, worker, working,