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Priority claimed from JP5149881Aexternal-prioritypatent/JPS57165150A/ja
Priority claimed from JP7268181Aexternal-prioritypatent/JPS57187110A/ja
Priority claimed from JP11668881Aexternal-prioritypatent/JPS5816728A/ja
Application filed by Daido Steel Co LtdfiledCriticalDaido Steel Co Ltd
Priority claimed from EP82102795Aexternal-prioritypatent/EP0062317B1/de
Application grantedgrantedCritical
Publication of ATE15077T1publicationCriticalpatent/ATE15077T1/de