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Application filed by И.Я. Дворянов, нов И.Я. ДворfiledCriticalИ.Я. Дворянов
Priority to SU160034ApriorityCriticalpatent/SU43508A1/ru
Application grantedgrantedCritical
Publication of SU43508A1publicationCriticalpatent/SU43508A1/ru