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Priority to JP1985130647UpriorityCriticalpatent/JPH0447971Y2/ja
Priority to US06/893,141prioritypatent/US4722027A/en
Publication of JPS6237940UpublicationCriticalpatent/JPS6237940U/ja
Application grantedgrantedCritical
Publication of JPH0447971Y2publicationCriticalpatent/JPH0447971Y2/ja
