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Priority to JP3100269UpriorityCriticalpatent/JPS5043660Y1/ja
Priority to US16885Aprioritypatent/US3667811A/en
Priority to DE19702010975prioritypatent/DE2010975C3/de
Priority to GB1266673Dprioritypatent/GB1266673A/en
Publication of JPS5043660Y1publicationCriticalpatent/JPS5043660Y1/ja