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Application filed by М.М. Серебряный, ный М.М. СеребрfiledCriticalМ.М. Серебряный
Priority to SU5951ApriorityCriticalpatent/SU28392A1/ru
Application grantedgrantedCritical
Publication of SU28392A1publicationCriticalpatent/SU28392A1/ru