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Priority to JP10306487UpriorityCriticalpatent/JPH0440540Y2/ja
Priority to KR2019880014907Uprioritypatent/KR950004424Y1/ko
Publication of JPS647843UpublicationCriticalpatent/JPS647843U/ja
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Publication of JPH0440540Y2publicationCriticalpatent/JPH0440540Y2/ja
