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Priority to JP1984199882UpriorityCriticalpatent/JPH0436001Y2/ja
Priority to US06/792,356prioritypatent/US4689725A/en
Publication of JPS61114601UpublicationCriticalpatent/JPS61114601U/ja
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Publication of JPH0436001Y2publicationCriticalpatent/JPH0436001Y2/ja