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Priority to JP1987115845UpriorityCriticalpatent/JPH0515597Y2/ja
Priority to US07/226,209prioritypatent/US4934914A/en
Publication of JPS6421290UpublicationCriticalpatent/JPS6421290U/ja
Application grantedgrantedCritical
Publication of JPH0515597Y2publicationCriticalpatent/JPH0515597Y2/ja
