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Priority to JP1989061910UpriorityCriticalpatent/JP2549659Y2/ja
Priority to KR1019890019388Aprioritypatent/KR970007296B1/ko
Priority to US07/462,765prioritypatent/US5091958A/en
Publication of JPH032800UpublicationCriticalpatent/JPH032800U/ja
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Publication of JP2549659Y2publicationCriticalpatent/JP2549659Y2/ja