Ключевые слова: abstract, background, barrel, building, business, chemical, chemistry, chimney, design, energy, engineer, engineering, environment, equipment, factory, fuel, gas, illustration, industrial, industrialplant, industry, insulation, line, machine, manufacturing, metal, oil, oilindustry, pairs, petrochemical, petroleum, pipe, pipeline, piping, plant, pollution, power, production, pump, refinery, resources, stainless, steel, supply, technology, tower, tube, valve, welding, worker,