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Application filed by Jindrich Jerabek, Josef Skaroupka, Frantisek NovakfiledCriticalJindrich Jerabek
Priority to CS857487ApriorityCriticalpatent/CS254791B1/cs
Publication of CS748785A1publicationCriticalpatent/CS748785A1/cs
Publication of CS254791B1publicationCriticalpatent/CS254791B1/cs