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Application filed by Komin Flex Sp Z OofiledCriticalKomin Flex Sp Z Oo
Priority to PL32803098ApriorityCriticalpatent/PL328030A1/en
Publication of PL328030A1publicationCriticalpatent/PL328030A1/en
Method of effectively preventing backflow of gaseous medium extracted from rooms through ventilation ducts in multiple-storied building and apparatus therefor