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Priority to JP11035385UpriorityCriticalpatent/JPH054108Y2/ja
Priority to KR1019860002241Aprioritypatent/KR900007480B1/ko
Publication of JPS6218840UpublicationCriticalpatent/JPS6218840U/ja
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Publication of JPH054108Y2publicationCriticalpatent/JPH054108Y2/ja