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Priority to JP8347790UpriorityCriticalpatent/JPH0441112U/ja
Priority to US07/607,806prioritypatent/US5082374A/en
Priority to KR1019900017817Aprioritypatent/KR910009558A/ko
Priority to DE69012741Tprioritypatent/DE69012741T2/de
Priority to EP90121312Aprioritypatent/EP0427238B1/en
Publication of JPH0441112UpublicationCriticalpatent/JPH0441112U/ja