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Publication of SU409461A1publicationCriticalpatent/SU409461A1/ru
Publication of SU384220A1publicationCriticalpatent/SU384220A1/ru
Application filed by Б.В. ИвановfiledCriticalБ.В. Иванов
Priority to SU1562ApriorityCriticalpatent/SU59991A1/ru
Application grantedgrantedCritical
Publication of SU59991A1publicationCriticalpatent/SU59991A1/ru