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Priority to JP12824680UpriorityCriticalpatent/JPS5753237U/ja
Priority to DE3135516Aprioritypatent/DE3135516C2/de
Priority to US06/300,452prioritypatent/US4446497A/en
Priority to FR8116981Aprioritypatent/FR2490048B1/fr
Priority to GB8127241Aprioritypatent/GB2083682B/en
Publication of JPS5753237UpublicationCriticalpatent/JPS5753237U/ja