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Priority to JP1989093011UpriorityCriticalpatent/JPH0618461Y2/ja
Priority to KR2019900011673Uprioritypatent/KR920008276Y1/ko
Publication of JPH0331863UpublicationCriticalpatent/JPH0331863U/ja
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Publication of JPH0618461Y2publicationCriticalpatent/JPH0618461Y2/ja