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Priority to JP3997980UpriorityCriticalpatent/JPS56142235U/ja
Priority to GB8108869Aprioritypatent/GB2073448B/en
Priority to US06/246,620prioritypatent/US4432319A/en
Priority to DE19813111978prioritypatent/DE3111978A1/de
Publication of JPS56142235UpublicationCriticalpatent/JPS56142235U/ja