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Priority to JP888289UpriorityCriticalpatent/JPH0299891U/ja
Priority to US07/372,454prioritypatent/US4967917A/en
Priority to KR2019890011300Uprioritypatent/KR920003797Y1/ko
Publication of JPH0299891UpublicationCriticalpatent/JPH0299891U/ja
