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Priority to JP12912788UpriorityCriticalpatent/JPH0633771Y2/ja
Priority to KR2019880020577Uprioritypatent/KR900010145Y1/ko
Publication of JPH0249818UpublicationCriticalpatent/JPH0249818U/ja
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Publication of JPH0633771Y2publicationCriticalpatent/JPH0633771Y2/ja