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Priority claimed from JP57016231Aexternal-prioritypatent/JPS58134451A/en
Priority claimed from JP57016230Aexternal-prioritypatent/JPS58134450A/en
Priority claimed from GB08302769Aexternal-prioritypatent/GB2115607B/en
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Publication of SG37587GpublicationCriticalpatent/SG37587G/en