Ключевые слова: abstract, background, build, canalization, construction, ditch, drain, drainage, duct, engineering, equipment, excavation, frame, grey, ground, housing, industrial, infrastructure, installation, line, maintenance, manufacturing, material, new, piled, pipe, pipeline, plastic, plumbing, pvc, repair, round, sand, sanitary, sewage, sewer, site, stack, storage, supply, system, technology, texture, tubing, warehouse, water,