Ключевые слова: aqueduct, bolt, construction, drill, drilling, ecology, electricity, energy, engineering, equipment, exploration, facility, faucets, flange, fuel, gas, industrial, industry, machinery, manufacturing, metal, oil, oil production, petrochemical, petrochemical plant, petroleum, pipeline, plant, pollution, power, pump, refinery, stainless, steel, structure, system, transportation, tube, valve, yellow,