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Application filed by В.П. Варенцов, Н.П. ПесоченскийfiledCriticalВ.П. Варенцов
Priority to SU??-0594ApriorityCriticalpatent/SU50381A1/en
Application grantedgrantedCritical
Publication of SU50381A1publicationCriticalpatent/SU50381A1/en