Ключевые слова: architectural, build, circular, conduit, connection, contractor, cylinder, duct, element, flowing, fluid, gray, group, housing, industrial, industry, infrastructure, installation, liquid, manufacturing, material, outdoor, pipe, pipeline, piping, plastic, plumber, plumbing, polymer, polyvinyl chloride, pvc, renovation, round, sanitary, several, sewage, sewer, sink, stack, stacked, storage, supply, system, tube, tubing, utility, various, warehouse,