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Application filed by Б.И. Коршунов, М.Б. Равич, Л.Л. ХотунцевfiledCriticalБ.И. Коршунов
Priority to SU377417ApriorityCriticalpatent/SU73627A1/en
Application grantedgrantedCritical
Publication of SU73627A1publicationCriticalpatent/SU73627A1/en