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Priority to JP1989084527UpriorityCriticalpatent/JPH0627486Y2/ja
Publication of JPH0324965UpublicationCriticalpatent/JPH0324965U/ja
Priority to US07/758,496prioritypatent/US5161028A/en
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Publication of JPH0627486Y2publicationCriticalpatent/JPH0627486Y2/ja