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Priority to JP16317778UpriorityCriticalpatent/JPS6111491Y2/ja
Priority to GB7913568Aprioritypatent/GB2027812B/en
Priority to US06/041,188prioritypatent/US4228111A/en
Publication of JPS5583239UpublicationCriticalpatent/JPS5583239U/ja
Application grantedgrantedCritical
Publication of JPS6111491Y2publicationCriticalpatent/JPS6111491Y2/ja