Ключевые слова: abstract, background, bag, building, canalization, catheter, circular, commercial, corrosion, culvert, cylinder, drainage, groove, hardware, health, heap, industrial manufacturing, industry, iron and steel, many, metal, mode, new, pipe, plastic, port, pu, pvc, reactor, red, round, rust, sewer, stack, stainless steel, stockyard, tube, vinyl, warehouse, water,