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Priority to JP1990059331UpriorityCriticalpatent/JPH0739717Y2/ja
Priority to US07/696,504prioritypatent/US5158006A/en
Publication of JPH0418065UpublicationCriticalpatent/JPH0418065U/ja
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Publication of JPH0739717Y2publicationCriticalpatent/JPH0739717Y2/ja