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Application filed by М.Я. Петрусинский, С.И. ФроловfiledCriticalМ.Я. Петрусинский
Priority to SU158414ApriorityCriticalpatent/SU42034A1/en
Application grantedgrantedCritical
Publication of SU42034A1publicationCriticalpatent/SU42034A1/en