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Priority to JP1987104161UpriorityCriticalpatent/JPH0747603Y2/ja
Publication of JPS6412906UpublicationCriticalpatent/JPS6412906U/ja
Priority to US07/499,031prioritypatent/US5048395A/en
Application grantedgrantedCritical
Publication of JPH0747603Y2publicationCriticalpatent/JPH0747603Y2/ja
