Ключевые слова: abstract, aluminum, background, closeup, connection, connector, construction, engineering, equipment, fitting, glazed, group, improvement, industrial, industry, iron, line, linear, manufacturing, material, metallic, new, pile, pipe, pipeline, piping, plastic, plumbing, polyethylene, polypropylene, pvc, repair, round, row, rusty, sewer, stack, steel, technology, thread, tool, tube, vinyl, warehouse, water,