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Application filed by И.Б. Визенталь, Л.Л. Лавринович, С.В. ШишкинfiledCriticalИ.Б. Визенталь
Priority to SU372792ApriorityCriticalpatent/SU74250A1/en
Application grantedgrantedCritical
Publication of SU74250A1publicationCriticalpatent/SU74250A1/en