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Priority claimed from JP62207093Aexternal-prioritypatent/JPS6451132A/en
Priority claimed from JP62240205Aexternal-prioritypatent/JPS6485124A/en
Priority claimed from JP62240204Aexternal-prioritypatent/JPS6485123A/en
Application filed by Asahi Denka Kogyo KkfiledCriticalAsahi Denka Kogyo Kk
Priority claimed from EP88113067Aexternal-prioritypatent/EP0303970B1/en
Application grantedgrantedCritical
Publication of ATE86523T1publicationCriticalpatent/ATE86523T1/en