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Priority claimed from JP12607694Aexternal-prioritypatent/JP3228002B2/ja
Priority claimed from JP22449694Aexternal-prioritypatent/JPH0887945A/ja
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Application grantedgrantedCritical
Publication of TW282549BpublicationCriticalpatent/TW282549B/zh