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Application filed by Perner Bohumil, Kvapil Jiri, Miroslav Havrdlik, Kvapil JoseffiledCriticalPerner Bohumil
Priority to CS844768ApriorityCriticalpatent/CS242418B1/en
Publication of CS476884A1publicationCriticalpatent/CS476884A1/en
Publication of CS242418B1publicationCriticalpatent/CS242418B1/en