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Priority to JP18741982UpriorityCriticalpatent/JPS5990424U/ja
Publication of JPS5990424UpublicationCriticalpatent/JPS5990424U/ja
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Publication of JPS6121230Y2publicationCriticalpatent/JPS6121230Y2/ja
Priority to KR2019890015185Uprioritypatent/KR900004044Y1/ko