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Application filed by Б. М. Егоров, В. В. Нечаев , В. В. ФокинfiledCriticalБ. М. Егоров, В. В. Нечаев , В. В. Фокин
Priority to SU1944129ApriorityCriticalpatent/SU181606A1/ru
Application grantedgrantedCritical
Publication of SU181606A1publicationCriticalpatent/SU181606A1/ru