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Application filed by С.Ф. Венда, И.И. ВолодинfiledCriticalС.Ф. Венда
Priority to SU171475ApriorityCriticalpatent/SU48943A1/ru
Publication of SU46538A1publicationCriticalpatent/SU46538A1/ru
Application grantedgrantedCritical
Publication of SU48943A1publicationCriticalpatent/SU48943A1/ru