Ключевые слова: background, blue, boiler, building, business, chemical, construction, control, design, energy, engineering, equipment, factory, faucet, fuel, gas, gasoline, heat, hose, industrial, insulation, iron, line, machine, manufacturing, metallic, modern, oil, old, pipelines, pipes, plant, plumbing, power, pressure, production, pump, refinery, stainless, steam, steel, structure, system, tank, tap, technology, tube, valve, water, work,