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Priority claimed from JP11023180Aexternal-prioritypatent/JPS5737922A/en
Priority claimed from JP11023280Aexternal-prioritypatent/JPS5737924A/en
Priority claimed from GB8123641Aexternal-prioritypatent/GB2082411B/en
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Publication of SG27386GpublicationCriticalpatent/SG27386G/en