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Application filed by М.В. Бородулин, В.Н. НемчиноваfiledCriticalМ.В. Бородулин
Priority to SU149153ApriorityCriticalpatent/SU40480A1/en
Application grantedgrantedCritical
Publication of SU40480A1publicationCriticalpatent/SU40480A1/en