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Priority to JP15121888UpriorityCriticalpatent/JPH0627686Y2/ja
Priority to CN 89109192prioritypatent/CN1017363B/zh
Publication of JPH0271711UpublicationCriticalpatent/JPH0271711U/ja
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Publication of JPH0627686Y2publicationCriticalpatent/JPH0627686Y2/ja
