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Priority to JP11523490UpriorityCriticalpatent/JPH0755335Y2/ja
Priority to KR91001872Uprioritypatent/KR940006133Y1/ko
Publication of JPH0471774UpublicationCriticalpatent/JPH0471774U/ja
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Publication of JPH0755335Y2publicationCriticalpatent/JPH0755335Y2/ja