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Priority to JP17749286UpriorityCriticalpatent/JPH0422840Y2/ja
Priority to CN 87105640prioritypatent/CN87105640A/zh
Publication of JPS6386874UpublicationCriticalpatent/JPS6386874U/ja
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Publication of JPH0422840Y2publicationCriticalpatent/JPH0422840Y2/ja