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Application filed by И.С. Дмитриев, И.М. МадатовfiledCriticalИ.С. Дмитриев
Priority to SU383587ApriorityCriticalpatent/SU77688A1/ru
Application grantedgrantedCritical
Publication of SU77688A1publicationCriticalpatent/SU77688A1/ru