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Priority to JP14669180UpriorityCriticalpatent/JPS5769339U/ja
Priority to US06/210,378prioritypatent/US4416024A/en
Priority to DE8080304577Tprioritypatent/DE3067653D1/de
Priority to EP80304577Aprioritypatent/EP0030874B1/en
Publication of JPS5769339UpublicationCriticalpatent/JPS5769339U/ja