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Priority to JP1984171447UpriorityCriticalpatent/JPH0238447Y2/ja
Priority to US06/796,814prioritypatent/US4723899A/en
Publication of JPS6186938UpublicationCriticalpatent/JPS6186938U/ja
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Publication of JPH0238447Y2publicationCriticalpatent/JPH0238447Y2/ja