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Priority to JP1989042194UpriorityCriticalpatent/JPH0437521Y2/ja
Priority to US07/504,629prioritypatent/US5064993A/en
Publication of JPH02134907UpublicationCriticalpatent/JPH02134907U/ja
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Publication of JPH0437521Y2publicationCriticalpatent/JPH0437521Y2/ja
