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Priority to JP6223368UpriorityCriticalpatent/JPS5347639Y1/ja
Priority to US841286Aprioritypatent/US3601618A/en
Priority to GB1231720Dprioritypatent/GB1231720A/en
Priority to FR6924679Aprioritypatent/FR2013418A1/fr
Publication of JPS5347639Y1publicationCriticalpatent/JPS5347639Y1/ja