Ключевые слова: abstract, aluminum, background, bending, blue, building, business, chemical, chimney, closeup, communications, complex, construction, energy, engineering, environment, facility, factory, fuel, gas, heavy, high, hot, indoor, industrial, industry, interior, iron, metal, modern, oil, petrol, pipeline, piping, power, production, pump, refinery, science, station, steel, stem, structure, system, textured, tool, tube, tubing, valve,