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Priority to JP1987163450UpriorityCriticalpatent/JPH088321Y2/ja
Publication of JPH0167304UpublicationCriticalpatent/JPH0167304U/ja
Priority to US07/499,031prioritypatent/US5048395A/en
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Publication of JPH088321Y2publicationCriticalpatent/JPH088321Y2/ja
