Ключевые слова: background, business, chemical, closeup, connection, construction, control, crisis, drilling, duct, ecology, energy, engineering, equipment, faucet, flowing, fuel, gas, gasoline, industrial, industry, liquid, manual, metal, off, oil, open, pipe, pipeline, plant, power, pressure, production, pump, safety, shut, station, steel, supply, system, tap, technology, transmission, tube, valva, valve, water, well, wheel,