poollahkvoolne kanalisatsioon on kombineeritud lahk- ja ühisvoolsest süsteemist, kus reoveed ja sademeveed voolavad eraldi torustikes ning peatorustik reoveepuhastusjaama on ühisvoolne
semi-polar sewerage is a combination of a separate and a combined sewerage system, where wastewater and rainwater flow in separate pipes and the main line to the treatment plant is combined sewerage
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