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Priority to JP13183088UpriorityCriticalpatent/JPH0534426Y2/ja
Publication of JPH0254638UpublicationCriticalpatent/JPH0254638U/ja
Priority to US07/729,779prioritypatent/US5159892A/en
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Publication of JPH0534426Y2publicationCriticalpatent/JPH0534426Y2/ja