Ключевые слова: air, background, business, chemical, chemistry, construction, control, crisis, danger, dirty, energy, equipment, factory, faucet, fuel, gas, gasoline, gaz, heat, industrial, industry, iron, leak, line, metal, natural, oil, petroleum, pipe, pipeline, pipes, piping, plant, power, profit, pump, refinery, sky, stainless, steel, supplies, supply, technology, tube, valve, valves, yellow,