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Application filed by Zikmund Jan, Kvapil Josef, Blazek KarelfiledCriticalZikmund Jan
Priority to CS861551ApriorityCriticalpatent/CS252917B1/en
Publication of CS155186A1publicationCriticalpatent/CS155186A1/en
Publication of CS252917B1publicationCriticalpatent/CS252917B1/en