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Priority to JP15715780UpriorityCriticalpatent/JPS6131387Y2/ja
Priority to US06/292,714prioritypatent/US4406520A/en
Priority to GB8124871Aprioritypatent/GB2082344B/en
Priority to DE19813132290prioritypatent/DE3132290A1/de
Publication of JPS5779946UpublicationCriticalpatent/JPS5779946U/ja
Application grantedgrantedCritical
Publication of JPS6131387Y2publicationCriticalpatent/JPS6131387Y2/ja