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Application filed by Ladislav Ing Novotny, Frantisek Ing Sip, Frantisek Ing ZakfiledCriticalLadislav Ing Novotny
Priority to CS837684ApriorityCriticalpatent/CS235891B1/en
Publication of CS768483A1publicationCriticalpatent/CS768483A1/en
Publication of CS235891B1publicationCriticalpatent/CS235891B1/en