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Application grantedgrantedCritical
Publication of SU1600A1publicationCriticalpatent/SU1600A1/ru
Application filed by М.С. СтепановfiledCriticalМ.С. Степанов
Priority to SU2493ApriorityCriticalpatent/SU58695A1/ru
Priority claimed from SU2493Aexternal-prioritypatent/SU58695A1/ru
Publication of SU58695A1publicationCriticalpatent/SU58695A1/ru