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Publication date
Application filed by С.В. Ермилов, А.Л. ШермушенкоfiledCriticalС.В. Ермилов
Priority to SU??-1071ApriorityCriticalpatent/SU51964A1/en
Application grantedgrantedCritical
Publication of SU51964A1publicationCriticalpatent/SU51964A1/en