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Application filed by I V Garmonov, N F Kovalev, M S Perfileva, N A Pokrovskaya, G A Tikhomirova, Estrin As, M I Brejman, L V Karpova, A A Kraev, A I Lukyanov, N N Nazarova, V L RudkovskijfiledCriticalI V Garmonov
Priority to SU742041602ApriorityCriticalpatent/SU520769A1/en
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Publication of SU520769A1publicationCriticalpatent/SU520769A1/en