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Priority to JP1989151126UpriorityCriticalpatent/JPH0390285U/ja
Priority to KR1019900010085Aprioritypatent/KR930007786B1/ko
Priority to US07/606,088prioritypatent/US5164528A/en
Priority to GB9023740Aprioritypatent/GB2239548B/en
Priority to CN 90106081prioritypatent/CN1024051C/zh
Publication of JPH0390285UpublicationCriticalpatent/JPH0390285U/ja