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Application filed by М.А. Матвеев, К.М. ТкаченкоfiledCriticalМ.А. Матвеев
Priority to SU379061ApriorityCriticalpatent/SU76294A1/ru
Application grantedgrantedCritical
Publication of SU76294A1publicationCriticalpatent/SU76294A1/ru