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Priority to JP1990075551UpriorityCriticalpatent/JP2507559Y2/ja
Priority to US07/658,484prioritypatent/US5131865A/en
Publication of JPH0435372UpublicationCriticalpatent/JPH0435372U/ja
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Publication of JP2507559Y2publicationCriticalpatent/JP2507559Y2/ja