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Priority to JP8998485UpriorityCriticalpatent/JPH0522775Y2/ja
Priority to KR2019860008242Uprioritypatent/KR920007648Y1/ko
Publication of JPS6231270UpublicationCriticalpatent/JPS6231270U/ja
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Publication of JPH0522775Y2publicationCriticalpatent/JPH0522775Y2/ja