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Application filed by Frantisek Hanulik, Antonin Kravacek, Vladislav Dobes, Josef Romanek, Jan ViktorafiledCriticalFrantisek Hanulik
Priority to CS855029ApriorityCriticalpatent/CS253472B1/en
Publication of CS502985A1publicationCriticalpatent/CS502985A1/en
Publication of CS253472B1publicationCriticalpatent/CS253472B1/en