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Application filed by А.А. Авербух, Б.И. Грилихес, И.Н. ИзаксонfiledCriticalА.А. Авербух
Priority to SU384973ApriorityCriticalpatent/SU77555A2/en
Application grantedgrantedCritical
Publication of SU77555A2publicationCriticalpatent/SU77555A2/en