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Priority to JP1988053302UpriorityCriticalpatent/JP2505232Y2/ja
Priority to US07/340,062prioritypatent/US4949989A/en
Publication of JPH01158210UpublicationCriticalpatent/JPH01158210U/ja
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Publication of JP2505232Y2publicationCriticalpatent/JP2505232Y2/ja
