Ключевые слова: african, american, black, blueprints, business, coal, construction, dig, dirty, dust, earth, employee, energy, engineer, engineering, equipment, extraction, factory, foreman, fossil, fuel, geology, global, gold, heavy, helmet, huge, industry, job, machine, machinery, male, man, manufacturing, mine, miner, mineral, occupation, operation, person, pit, professional, resource, rock, safety, technician, technology, truck, work,