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Application filed by И.М. Енгалычев, Л.Н. Оситковская, Л.Н. ОситковскаfiledCriticalИ.М. Енгалычев
Priority to SU1613ApriorityCriticalpatent/SU70199A1/ru
Application grantedgrantedCritical
Publication of SU70199A1publicationCriticalpatent/SU70199A1/ru