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Priority to JP12898978UpriorityCriticalpatent/JPS5546538U/ja
Priority to GB7849021Aprioritypatent/GB2012626B/en
Priority to FR7835950Aprioritypatent/FR2413569B1/fr
Priority to DE19782856002prioritypatent/DE2856002A1/de
Publication of JPS5546538UpublicationCriticalpatent/JPS5546538U/ja