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Priority to JP1988025710UpriorityCriticalpatent/JP2502967Y2/ja
Priority to US07/315,475prioritypatent/US4885963A/en
Publication of JPH01129055UpublicationCriticalpatent/JPH01129055U/ja
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Publication of JP2502967Y2publicationCriticalpatent/JP2502967Y2/ja
