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Application filed by Jurij V Sorokij, Jefim V Kvejnin, Petr P JemeljanovfiledCriticalJurij V Sorokij
Priority to CS831436ApriorityCriticalpatent/CS251227B1/en
Publication of CS143683A1publicationCriticalpatent/CS143683A1/en
Publication of CS251227B1publicationCriticalpatent/CS251227B1/en