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Priority claimed from JP22404887Aexternal-prioritypatent/JPS6468416A/ja
Priority claimed from JP62285444Aexternal-prioritypatent/JP2674041B2/ja
Priority claimed from JP62330979Aexternal-prioritypatent/JP2615728B2/ja
Application filed by Nippon Kokan KkfiledCriticalNippon Kokan Kk
Priority claimed from EP88907784Aexternal-prioritypatent/EP0331751B1/de
Application grantedgrantedCritical
Publication of ATE103006T1publicationCriticalpatent/ATE103006T1/de