Ключевые слова: city, construction, control, corrosion, ditch, duct, equipment, fund, heating, industrial, industry, iron, large, laying, line, main, mains, metal, modernization, multi, municipal, old, pipe, pipeline, pipes, preparation, problems, pump, reconstruction, repair, replacement, rotten, russia, rust, rusty, season, service, sewerage, steel, storey, street, supply, system, trench, tube, valve, valves, water, wear,