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Application filed by Ю.Б. Исаев, А.А. ПономаревfiledCriticalЮ.Б. Исаев
Priority to SU385872ApriorityCriticalpatent/SU77941A1/en
Application grantedgrantedCritical
Publication of SU77941A1publicationCriticalpatent/SU77941A1/en