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Priority to JP14093282UpriorityCriticalpatent/JPS5942982U/ja
Priority to GB08322587Aprioritypatent/GB2130383B/en
Publication of JPS5942982UpublicationCriticalpatent/JPS5942982U/ja
Priority to US06/875,517prioritypatent/US4766371A/en
Application grantedgrantedCritical
Publication of JPH0422315Y2publicationCriticalpatent/JPH0422315Y2/ja