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Priority claimed from JP59272389Aexternal-prioritypatent/JPS61149436A/ja
Priority claimed from JP60120576Aexternal-prioritypatent/JPS61279626A/ja
Priority claimed from JP60151305Aexternal-prioritypatent/JPS6213528A/ja
Application filed by Nippon Steel CorpfiledCriticalNippon Steel Corp
Priority claimed from EP85308972Aexternal-prioritypatent/EP0186373B1/de
Application grantedgrantedCritical
Publication of ATE56477T1publicationCriticalpatent/ATE56477T1/de