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Priority to JP1985059163UpriorityCriticalpatent/JPH0353341Y2/ja
Priority to US06/772,803prioritypatent/US4763111A/en
Publication of JPS61176684UpublicationCriticalpatent/JPS61176684U/ja
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Publication of JPH0353341Y2publicationCriticalpatent/JPH0353341Y2/ja