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Priority to JP1989098572UpriorityCriticalpatent/JPH0716674Y2/ja
Priority to KR2019900012477Uprioritypatent/KR950007146Y1/ko
Priority to US07/571,858prioritypatent/US5111252A/en
Publication of JPH0338860UpublicationCriticalpatent/JPH0338860U/ja
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Publication of JPH0716674Y2publicationCriticalpatent/JPH0716674Y2/ja