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Priority to JP1985142973UpriorityCriticalpatent/JPS6251066U/ja
Priority to KR1019860007791Aprioritypatent/KR950002503B1/ko
Priority to US06/908,733prioritypatent/US4720664A/en
Publication of JPS6251066UpublicationCriticalpatent/JPS6251066U/ja