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Priority to JP1988077649UpriorityCriticalpatent/JPH02519U/ja
Priority to CN 89103690prioritypatent/CN1015203B/zh
Priority to US07/361,868prioritypatent/US4919120A/en
Priority to KR1019890008058Aprioritypatent/KR920004748B1/ko
Publication of JPH02519UpublicationCriticalpatent/JPH02519U/ja