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Hitachi Ltd
Original Assignee
Hitachi Ltd
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Publication date
Application filed by Hitachi LtdfiledCriticalHitachi Ltd
Priority to JP13404075ApriorityCriticalpatent/JPS5258193A/en
Publication of JPS5258193ApublicationCriticalpatent/JPS5258193A/en
PURPOSE:To assure relative movement between part and grinding material even when the rotating speed is increased, by utilization of rotation and revolution of the drum.