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Application filed by Vanek Frantisek, Frantisek Machala, Jan Okapal, Pospisil KarelfiledCriticalVanek Frantisek
Priority to CS869255ApriorityCriticalpatent/CS261118B1/en
Publication of CS925586A1publicationCriticalpatent/CS925586A1/en
Publication of CS261118B1publicationCriticalpatent/CS261118B1/en