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Priority to JP5234469UpriorityCriticalpatent/JPS506450Y1/ja
Priority to GB2621670Aprioritypatent/GB1305231A/en
Priority to US00042617Aprioritypatent/US3712351A/en
Priority to DE19702028299prioritypatent/DE2028299C/de
Publication of JPS506450Y1publicationCriticalpatent/JPS506450Y1/ja