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Publication of SU368732A1publicationCriticalpatent/SU368732A1/ru
Application filed by А.И. ЯковлевfiledCriticalА.И. Яковлев
Priority to SU138298ApriorityCriticalpatent/SU36483A1/ru
Application grantedgrantedCritical
Publication of SU36483A1publicationCriticalpatent/SU36483A1/ru