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Priority to JP12604588UpriorityCriticalpatent/JPH0247693U/ja
Priority to US07/362,502prioritypatent/US4924742A/en
Priority to KR1019890007807Aprioritypatent/KR910001631A/ko
Priority to EP89110303Aprioritypatent/EP0345761A2/en
Publication of JPH0247693UpublicationCriticalpatent/JPH0247693U/ja