Ключевые слова: accessmember, building, bunker, chamber, concrete, connection, construction, construction site, culverts, ditch, drain, drain systems, drainage, drainage system, drainage water, foundation, gate valve, ground, hole, household, industrial, industry, installation, laying, manhole, pipe, pipeline, pipes, piping, pit, plumbing, pump, pumping, rainwater, sanitary, sewage, sewer, sewer pipes, sewer wells, sewerage, site, storm, system, trench, underground, valve, valve chamber, valve pit, water, water main,