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Priority to JP5981390UpriorityCriticalpatent/JPH0439834Y2/ja
Priority to CN 91100770prioritypatent/CN1020568C/zh
Publication of JPH0418092UpublicationCriticalpatent/JPH0418092U/ja
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Publication of JPH0439834Y2publicationCriticalpatent/JPH0439834Y2/ja
