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Application filed by А.А. Авербух, В.И. Грилихес, И.Н. ИзаксонfiledCriticalА.А. Авербух
Priority to SU379728ApriorityCriticalpatent/SU75947A2/ru
Application grantedgrantedCritical
Publication of SU75947A2publicationCriticalpatent/SU75947A2/ru