Ключевые слова: beautiful lighting, career, chemicalindustry, clean, company, construction, danger, dangerouswork, ecology, electrical, energy, engineer, engineering, environment, exterior, facility, factory, fuel, fueltanks, gas, gaspipes, gasrefinery, generator, illustration, industrial, insulation, machine, man, metal, natural, oil, oil refinery, oilpipes, outdoor, petrochemical, pipeline construction, pipes, plant, plumbing, pollution, refinery, refinery plant, sign, smog, smoke, steel, storage, voltage, welding,