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Priority to JP1986181285UpriorityCriticalpatent/JPH0439595Y2/ja
Priority to KR1019870012605Aprioritypatent/KR900007885B1/ko
Priority to US07/119,642prioritypatent/US4754444A/en
Publication of JPS6387589UpublicationCriticalpatent/JPS6387589U/ja
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Publication of JPH0439595Y2publicationCriticalpatent/JPH0439595Y2/ja