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Priority to JP1988054220UpriorityCriticalpatent/JP2511401Y2/ja
Publication of JPH01160450UpublicationCriticalpatent/JPH01160450U/ja
Priority to US07/634,812prioritypatent/US5131079A/en
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Publication of JP2511401Y2publicationCriticalpatent/JP2511401Y2/ja
