Ключевые слова: blue, building, chemical, chemistry, color, complex, duct, energy, engine, engineering, environment, environmental, equipment, facility, factory, fuel, gas, green, heavy, high, industrial, industry, iron, landscape, machine, machinery, metal, nature, oil, outdoor, petrochemical, petroleum, petrolium, pipe, pipeline, piping, plant, power, production, refinery, silver, sky, station, steel, structure, tanks, technology, tower, tree, tube,