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Application filed by Lazarevich Nikolaj D, Perepelkin Mikhail M, Smolin Yurij AfiledCriticalLazarevich Nikolaj D
Priority to SU7502155418ApriorityCriticalpatent/SU575313A1/en
Application grantedgrantedCritical
Publication of SU575313A1publicationCriticalpatent/SU575313A1/en