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Priority to JP16552480UpriorityCriticalpatent/JPS6232335Y2/ja
Priority to US06/301,091prioritypatent/US4438510A/en
Publication of JPS5787313UpublicationCriticalpatent/JPS5787313U/ja
Application grantedgrantedCritical
Publication of JPS6232335Y2publicationCriticalpatent/JPS6232335Y2/ja