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Publication of SU392632A1publicationCriticalpatent/SU392632A1/ru
Application filed by Н.П. БудниковfiledCriticalН.П. Будников
Priority to SU131789ApriorityCriticalpatent/SU37698A1/ru
Application grantedgrantedCritical
Publication of SU37698A1publicationCriticalpatent/SU37698A1/ru