Ключевые слова: abstract, background, black, bundle, business, canalization, circle, circular, construction, corrosion, culvert, cylinder, ditch, drainage, ducts, foam, hardware, heat, industrial, industry, insulation, insulator, manufacturing, many, metal, old, pattern, piled, pipe, pipeline, pipes, plumbing, polyurethane, port, protection, round, rust, rusty, sanitary, sewer, stainless, steel, stockyard, thermal, thermally, tube, tubes, tubular, warehouse, water,