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Priority to JP1988093994UpriorityCriticalpatent/JP2529657Y2/ja
Priority to US07/321,709prioritypatent/US4953887A/en
Publication of JPH0215570UpublicationCriticalpatent/JPH0215570U/ja
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Publication of JP2529657Y2publicationCriticalpatent/JP2529657Y2/ja
