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Priority to JP1985160129UpriorityCriticalpatent/JPH0331963Y2/ja
Priority to US06/906,453prioritypatent/US4789876A/en
Publication of JPS6269247UpublicationCriticalpatent/JPS6269247U/ja
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Publication of JPH0331963Y2publicationCriticalpatent/JPH0331963Y2/ja