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Priority claimed from JP743212Aexternal-prioritypatent/JPS5146871B2/ja
Priority claimed from JP49115958Aexternal-prioritypatent/JPS5141620A/ja
Priority claimed from JP11670074Aexternal-prioritypatent/JPS5143309A/ja
Application filed by Kobe Steel LtdfiledCriticalKobe Steel Ltd
Publication of SE7511161LpublicationCriticalpatent/SE7511161L/sv