Ключевые слова: aqueduct, central, circulation, concrete, conduit, corroded, corrosion, countryside, coupling, cylinder, diameter, distribution, duct, elevated, equipment, europe, field, gas, green, ground, heat, heatconducting, heating, hot, industrial, industry, infrastructure, iron, large, line, metal, parallel, pipe, pipeline, piping, plumbing, rust, rusty, steel, summer, supply, support, system, transmission, tube, two, ukraine, water, watersupply,