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Priority to JP7655681UpriorityCriticalpatent/JPS6012787Y2/ja
Priority to KR2019820004090Uprioritypatent/KR890000328Y1/ko
Publication of JPS57188582UpublicationCriticalpatent/JPS57188582U/ja
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Publication of JPS6012787Y2publicationCriticalpatent/JPS6012787Y2/ja