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Priority to JP13053375UpriorityCriticalpatent/JPS5244511U/ja
Priority to GB39570/76Aprioritypatent/GB1565534A/en
Priority to US05/725,935prioritypatent/US4090578A/en
Priority to DE2643201Aprioritypatent/DE2643201C3/de
Publication of JPS5244511UpublicationCriticalpatent/JPS5244511U/ja