Ключевые слова: background, barrel, blue, building, business, chemical, chemistry, chimney, concrete, construction, energy, engineering, environment, equipment, factory, fuel, gas, gasoline, global, heavy, industrial, industry, manufactory, manufacturing, metal, oil, petrochemical, petroleum, pipe, pipeline, piping, plant, pollution, power, production, pump, refinery, resources, sky, stainless, station, steam, steel, structure, tank, technology, tower, tube, valve, water,