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Application filed by И.Е. Конторович, Р.И. МочалкинfiledCriticalИ.Е. Конторович
Priority to SU144141ApriorityCriticalpatent/SU41011A1/en
Application grantedgrantedCritical
Publication of SU41011A1publicationCriticalpatent/SU41011A1/en