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Application filed by Jiri Krystufek, Jaroslav Kopal, Otto WalterfiledCriticalJiri Krystufek
Priority to CS325778ApriorityCriticalpatent/CS199139B1/cs
Priority to DD21261979Aprioritypatent/DD148167A3/de
Publication of CS199139B1publicationCriticalpatent/CS199139B1/cs