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Application filed by А.А. Арутюнянц, нц А.А. АрутюнfiledCriticalА.А. Арутюнянц
Priority to SU274ApriorityCriticalpatent/SU68934A2/ru
Application grantedgrantedCritical
Publication of SU68934A2publicationCriticalpatent/SU68934A2/ru