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Priority to JP1987111611UpriorityCriticalpatent/JPH0528095Y2/ja
Priority to US07/221,797prioritypatent/US4871994A/en
Publication of JPS6416476UpublicationCriticalpatent/JPS6416476U/ja
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Publication of JPH0528095Y2publicationCriticalpatent/JPH0528095Y2/ja