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Priority to JP1977113862UpriorityCriticalpatent/JPS56626Y2/ja
Priority to GB49147/77Aprioritypatent/GB1563970A/en
Priority to US05/855,901prioritypatent/US4200018A/en
Publication of JPS5439560UpublicationCriticalpatent/JPS5439560U/ja
Application grantedgrantedCritical
Publication of JPS56626Y2publicationCriticalpatent/JPS56626Y2/ja