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Priority to JP1986096081UpriorityCriticalpatent/JPH0629551Y2/ja
Priority to US07/061,166prioritypatent/US4806977A/en
Publication of JPS632938UpublicationCriticalpatent/JPS632938U/ja
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Publication of JPH0629551Y2publicationCriticalpatent/JPH0629551Y2/ja