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Application filed by Г.Ф. ВолобоевfiledCriticalГ.Ф. Волобоев
Priority to SU2550302/06ApriorityCriticalpatent/SU661922A1/ru
Application grantedgrantedCritical
Publication of RU661922CpublicationCriticalpatent/RU661922C/ru
Publication of SU661922A1publicationCriticalpatent/SU661922A1/ru