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Priority to JP2561589UpriorityCriticalpatent/JPH064345Y2/ja
Priority to US07/490,067prioritypatent/US4998130A/en
Publication of JPH02117540UpublicationCriticalpatent/JPH02117540U/ja
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Publication of JPH064345Y2publicationCriticalpatent/JPH064345Y2/ja