Ключевые слова: aqueduct, business, cargo, conduit, delivering, delivery, duct, energy, equipment, fuel, fueling, gas, gasmain, gaspipe, heat, industrial, industry, isolated, latvia, lay, lead, line, main, metal, minerals, oil, petrol, petroleum, pipe, pipeline, piping, power, pressure, purveyance, reliable, resources, riga, running, russia, steel, supplier, supply, system, transfer, transit, transmission, trunk, tube,