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Application filed by В.Н. Герасичев, Т.В. СидороваfiledCriticalВ.Н. Герасичев
Priority to SU189064ApriorityCriticalpatent/SU48270A1/en
Application grantedgrantedCritical
Publication of SU48270A1publicationCriticalpatent/SU48270A1/en