Ключевые слова: background, blue, business, chemical, construction, design, electricity, energy, engineer, engineering, environment, equipment, factory, flow, fuel, gas, heavy, industrial, industry, insulation, line, manufacturing, metal, oil, petrochemical, petroleum, pipe, pipeline, pipelines, piping, plant, pollution, power, pressure, production, pump, refinery, sky, steam, steel, structure, supply, tank, technical, technology, tube, valve, vent, white,