Ключевые слова: accessory, black, building, butylene, conduit, connection, connector, construction, density, drain, drainage, embedded, equipment, ethylene, factory, hdpe, high, hose, installation, irrigation, joint, material, network, pe, pepipe, pipe, pipeline, plant, plastic, plumbing, poly, polyethylene, project, pvc, roll, roof, sewage, sewer, site, steel, storm, supply, support, system, tool, tube, vertical, wall, water, welding,