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Priority to JP1987103620UpriorityCriticalpatent/JPH0438489Y2/ja
Priority to KR1019870014816Aprioritypatent/KR920008395B1/ko
Publication of JPS648706UpublicationCriticalpatent/JPS648706U/ja
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Publication of JPH0438489Y2publicationCriticalpatent/JPH0438489Y2/ja