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Priority to JP1985054044UpriorityCriticalpatent/JPH0245464Y2/ja
Priority to US06/827,454prioritypatent/US4756561A/en
Publication of JPS61169221UpublicationCriticalpatent/JPS61169221U/ja
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Publication of JPH0245464Y2publicationCriticalpatent/JPH0245464Y2/ja