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Priority to JP18273086UpriorityCriticalpatent/JPH0246866Y2/ja
Priority to KR1019870004360Aprioritypatent/KR910004279B1/ko
Publication of JPS6388287UpublicationCriticalpatent/JPS6388287U/ja
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Publication of JPH0246866Y2publicationCriticalpatent/JPH0246866Y2/ja