Ключевые слова: architect, construction, contractor, development, employee, energy, engineer, engineering, facility, factory, fuel, gas, gasoline, hard, hard hat, hardhat, heavy, helmet, industrial, industry, inspection, job, machinery, man, manufacture, manufacturing, occupation, oil, person, petroleum, plant, pointing, pollution, power, production, profession, professional, protection, radio, refinery, safety, smoke, steel, storage, successful, sunrise, technician, transportation, work, worker,