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Priority to JP1980048848UpriorityCriticalpatent/JPH0218605Y2/ja
Priority to US06/242,366prioritypatent/US4339756A/en
Publication of JPS56150126UpublicationCriticalpatent/JPS56150126U/ja
Application grantedgrantedCritical
Publication of JPH0218605Y2publicationCriticalpatent/JPH0218605Y2/ja