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Priority to JP1989009858UpriorityCriticalpatent/JP2513321Y2/ja
Publication of JPH02109168UpublicationCriticalpatent/JPH02109168U/ja
Priority to US07/722,403prioritypatent/US5172758A/en
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Publication of JP2513321Y2publicationCriticalpatent/JP2513321Y2/ja
