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Priority to JP40663390UpriorityCriticalpatent/JPH0646385Y2/ja
Priority to KR919103927Uprioritypatent/KR930004379Y1/ko
Publication of JPH0491182UpublicationCriticalpatent/JPH0491182U/ja
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Publication of JPH0646385Y2publicationCriticalpatent/JPH0646385Y2/ja