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Priority to JP1988158712UpriorityCriticalpatent/JPH0520148Y2/ja
Priority to KR2019890017255Uprioritypatent/KR920000411Y1/ko
Publication of JPH0278067UpublicationCriticalpatent/JPH0278067U/ja
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Publication of JPH0520148Y2publicationCriticalpatent/JPH0520148Y2/ja