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Application filed by А.Е. Арбузов, Б.П. ЛуговкинfiledCriticalА.Е. Арбузов
Priority to SU109536ApriorityCriticalpatent/SU31434A1/en
Application grantedgrantedCritical
Publication of SU31434A1publicationCriticalpatent/SU31434A1/en