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Application filed by В.В. Алексеев, В.А. Берг, В.И. ВолковfiledCriticalВ.В. Алексеев
Priority to SU138120ApriorityCriticalpatent/SU36534A1/ru
Application grantedgrantedCritical
Publication of SU36534A1publicationCriticalpatent/SU36534A1/ru