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Priority to JP17834282UpriorityCriticalpatent/JPS5980598U/ja
Priority to GB08321756Aprioritypatent/GB2126680B/en
Publication of JPS5980598UpublicationCriticalpatent/JPS5980598U/ja
Application grantedgrantedCritical
Publication of JPS636319Y2publicationCriticalpatent/JPS636319Y2/ja
Priority to KR2019890015246Uprioritypatent/KR900003940Y1/ko