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Application filed by В.Я. СавченкоfiledCriticalВ.Я. Савченко
Priority to SU2144891/06ApriorityCriticalpatent/SU544268A1/ru
Application grantedgrantedCritical
Publication of RU544268CpublicationCriticalpatent/RU544268C/ru
Publication of SU544268A1publicationCriticalpatent/SU544268A1/ru