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Priority to JP1984194525UpriorityCriticalpatent/JPH0246442Y2/ja
Priority to US06/811,947prioritypatent/US4655477A/en
Publication of JPS61108668UpublicationCriticalpatent/JPS61108668U/ja
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Publication of JPH0246442Y2publicationCriticalpatent/JPH0246442Y2/ja