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Priority to JP9060388UpriorityCriticalpatent/JPH0211708U/ja
Priority to KR2019890000245Uprioritypatent/KR920000868Y1/ko
Priority to US07/367,709prioritypatent/US4935717A/en
Publication of JPH0211708UpublicationCriticalpatent/JPH0211708U/ja