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Application filed by Г.Ф. Далецкий, Н.А. МандрыкfiledCriticalГ.Ф. Далецкий
Priority to SU165761ApriorityCriticalpatent/SU45005A1/en
Application grantedgrantedCritical
Publication of SU45005A1publicationCriticalpatent/SU45005A1/en