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Priority to JP11344676UpriorityCriticalpatent/JPS5332355U/ja
Priority to GB23715/77Aprioritypatent/GB1578573A/en
Priority to DE2725413Aprioritypatent/DE2725413C2/de
Priority to US05/803,775prioritypatent/US4165604A/en
Publication of JPS5332355UpublicationCriticalpatent/JPS5332355U/ja
Priority to US06/034,192prioritypatent/US4276629A/en