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Priority to JP1988168943UpriorityCriticalpatent/JP2502501Y2/ja
Priority to US07/456,642prioritypatent/US5003958A/en
Publication of JPH0290362UpublicationCriticalpatent/JPH0290362U/ja
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Publication of JP2502501Y2publicationCriticalpatent/JP2502501Y2/ja
