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Application filed by Ludvik Hrivna, Augustin Ing RottenbergfiledCriticalLudvik Hrivna
Priority to CS824839ApriorityCriticalpatent/CS232371B1/cs
Publication of CS483982A1publicationCriticalpatent/CS483982A1/cs
Publication of CS232371B1publicationCriticalpatent/CS232371B1/cs