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Priority to JP1989141386UpriorityCriticalpatent/JP2532312Y2/ja
Priority to US07/621,971prioritypatent/US5161750A/en
Publication of JPH0379668UpublicationCriticalpatent/JPH0379668U/ja
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Publication of JP2532312Y2publicationCriticalpatent/JP2532312Y2/ja
