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Application filed by С.А. Векшинский, Я.Е. КонторовичfiledCriticalС.А. Векшинский
Priority to SU31972ApriorityCriticalpatent/SU15393A1/en
Application grantedgrantedCritical
Publication of SU15393A1publicationCriticalpatent/SU15393A1/en