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Priority to JP5351988UpriorityCriticalpatent/JPH0449762Y2/ja
Priority to US07/331,324prioritypatent/US4931912A/en
Priority to KR1019890005061Aprioritypatent/KR900015980A/ko
Publication of JPH01158601UpublicationCriticalpatent/JPH01158601U/ja
Priority to KR9206392Uprioritypatent/KR920003936Y1/ko
Application grantedgrantedCritical
Publication of JPH0449762Y2publicationCriticalpatent/JPH0449762Y2/ja
