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Priority to JP1985145384UpriorityCriticalpatent/JPH0422716Y2/ja
Priority to US06/874,580prioritypatent/US4719955A/en
Publication of JPS6252696UpublicationCriticalpatent/JPS6252696U/ja
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Publication of JPH0422716Y2publicationCriticalpatent/JPH0422716Y2/ja