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Priority to JP1978138482UpriorityCriticalpatent/JPS624765Y2/ja
Priority to US06/081,590prioritypatent/US4272085A/en
Publication of JPS5555660UpublicationCriticalpatent/JPS5555660U/ja
Application grantedgrantedCritical
Publication of JPS624765Y2publicationCriticalpatent/JPS624765Y2/ja