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Application filed by И.Л. Полякин, кин И.Л. ПолfiledCriticalИ.Л. Полякин
Priority to SU376127ApriorityCriticalpatent/SU76938A1/ru
Application grantedgrantedCritical
Publication of SU76938A1publicationCriticalpatent/SU76938A1/ru