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Priority to JP1990007169UpriorityCriticalpatent/JPH0430971Y2/ja
Priority to KR1019910001308Aprioritypatent/KR910014080A/ko
Publication of JPH0399518UpublicationCriticalpatent/JPH0399518U/ja
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Publication of JPH0430971Y2publicationCriticalpatent/JPH0430971Y2/ja