Ключевые слова: abstract, background, build, building, canalization, circle, closeup, construction, culvert, ditch, drain, drainage, duct, engineering, equipment, frame, housing, industrial, industry, line, manufacturing, materials, new, orange, pattern, piled, pipe, pipeline, pipes, piping, plastic, plumber, plumbing, pvc, repair, round, service, sewage, sewer, sewerage, site, stack, storage, supply, technology, texture, tube, tubes, tubing, water,