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Priority to JP8958789UpriorityCriticalpatent/JPH087736Y2/ja
Publication of JPH0328872UpublicationCriticalpatent/JPH0328872U/ja
Priority to US07/865,655prioritypatent/US5221972A/en
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Publication of JPH087736Y2publicationCriticalpatent/JPH087736Y2/ja