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Priority to JP1989060134UpriorityCriticalpatent/JPH0715020Y2/ja
Priority to US07/526,821prioritypatent/US5079985A/en
Publication of JPH02149992UpublicationCriticalpatent/JPH02149992U/ja
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Publication of JPH0715020Y2publicationCriticalpatent/JPH0715020Y2/ja