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Priority to JP1987116045UpriorityCriticalpatent/JPH0445902Y2/ja
Priority to KR888811383Uprioritypatent/KR910009121Y1/ko
Publication of JPS6420361UpublicationCriticalpatent/JPS6420361U/ja
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Publication of JPH0445902Y2publicationCriticalpatent/JPH0445902Y2/ja