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Priority to JP1987085105UpriorityCriticalpatent/JPH0619891Y2/ja
Priority to US07/199,650prioritypatent/US4860715A/en
Publication of JPS63193180UpublicationCriticalpatent/JPS63193180U/ja
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Publication of JPH0619891Y2publicationCriticalpatent/JPH0619891Y2/ja