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Priority to JP1986174862UpriorityCriticalpatent/JPH0313779Y2/ja
Priority to US07/111,613prioritypatent/US4907468A/en
Publication of JPS6380223UpublicationCriticalpatent/JPS6380223U/ja
Application grantedgrantedCritical
Publication of JPH0313779Y2publicationCriticalpatent/JPH0313779Y2/ja