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Priority to JP8005882UpriorityCriticalpatent/JPS58182022U/ja
Priority to GB08307598Aprioritypatent/GB2121494B/en
Priority to US06/478,774prioritypatent/US4792021A/en
Publication of JPS58182022UpublicationCriticalpatent/JPS58182022U/ja
Application grantedgrantedCritical
Publication of JPS6221785Y2publicationCriticalpatent/JPS6221785Y2/ja