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Priority to JP18272986UpriorityCriticalpatent/JPH0246865Y2/ja
Priority to KR1019870004360Aprioritypatent/KR910004279B1/ko
Publication of JPS6388286UpublicationCriticalpatent/JPS6388286U/ja
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Publication of JPH0246865Y2publicationCriticalpatent/JPH0246865Y2/ja