Ключевые слова: build, building, concrete, connection, construction, cylinder, dig, dirt, drain, drainage, ducts, equipment, excavation, fitting, flow, industrial, industry, installation, line, liquid, maintenance, metal, outdoor, pipe, pipeline, piping, plumber, plumbing, project, pvc, road, round, rustproof, sand, sewage, sewer, site, soil, steel, supply, surface, system, technology, terrain, tube, unfinished, water, waterway,