Ключевые слова: background, blue, building, business, chemical, chemistry, connection, construction, crude oil, electricity, energy, engineering, environment, equipment, facility, factory, fuel, gas, gasoline, heavy, industrial, industry, machine, machinery, manufacturing, metal, oil, petrochemical, pipe, pipeline, piping, plant, pollution, power, pressure, production, pump, refinery, resource, sky, smoke, steel, storage, structure, sunset, supply, technology, tower, tube, water,