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Priority to JP9895487UpriorityCriticalpatent/JPS646109U/ja
Priority to KR1019880007438Aprioritypatent/KR890001219A/ko
Priority to US07/209,543prioritypatent/US4864316A/en
Priority to EP88305838Aprioritypatent/EP0297813A3/en
Publication of JPS646109UpublicationCriticalpatent/JPS646109U/ja