Ключевые слова: abstract, background, barrel, black, blue, business, concrete, design, energy, engineer, engineering, equipment, factory, fuel, gas, heavy, illustration, industrial, industrialplant, industry, insulation, line, machine, manufacturing, metal, oilindustry, pairs, pipe, pipeline, piping, plant, power, pressure, production, pump, refinery, reflection, resources, shine, sign, stainless, steel, supply, technology, tube, valve, welding, worker, workshop,