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Application filed by Masnik Frantisek, Jozef Ing Zizka, Anton Ing HlavacfiledCriticalMasnik Frantisek
Priority to CS837794ApriorityCriticalpatent/CS239573B1/en
Publication of CS779483A1publicationCriticalpatent/CS779483A1/en
Publication of CS239573B1publicationCriticalpatent/CS239573B1/en