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Application filed by Frantisek Ing Dufek, Petr Ing Winkler, Ivan Ing Csc TalpafiledCriticalFrantisek Ing Dufek
Priority to CS876873ApriorityCriticalpatent/CS263935B1/en
Publication of CS687387A1publicationCriticalpatent/CS687387A1/en
Publication of CS263935B1publicationCriticalpatent/CS263935B1/en