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Priority to JP1980187247UpriorityCriticalpatent/JPS646322Y2/ja
Priority to KR2019810003591Uprioritypatent/KR870003030Y1/ko
Publication of JPS57107610UpublicationCriticalpatent/JPS57107610U/ja
Application grantedgrantedCritical
Publication of JPS646322Y2publicationCriticalpatent/JPS646322Y2/ja