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hoone kanalisatsioon, mille püstikud on pikendustorude kaudu ühendatud välisõhuga, the building's riser pipes, which is connected to the outside air via extension pipes
primary ventilated sewer system . Veevarustuse ja kanalisatsiooniga seotud terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//evkis/primary%20ventilated%20sewer%20system/1/eng (01.08.2026)
