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Priority to JP4852275UpriorityCriticalpatent/JPS5321987Y2/ja
Priority to US05/611,958prioritypatent/US4019864A/en
Publication of JPS51130742UpublicationCriticalpatent/JPS51130742U/ja
Application grantedgrantedCritical
Publication of JPS5321987Y2publicationCriticalpatent/JPS5321987Y2/ja