Ключевые слова: barrel, business, cargo, conduit, delivering, delivery, energy, equipment, fuel, fueling, gas, heat, industry, lay, lead, line, main, metal, mineral, minerals, oil, petrol, petroleum, pipe, pipeline, piping, power, pressure, purveyance, reliable, resources, rolling, running, squeeze, steel, supplier, supply, swap, swapping, system, transfer, transit, transmission, trunk, tube,