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Priority to JP15604579UpriorityCriticalpatent/JPS6130932Y2/ja
Priority to GB8034980Aprioritypatent/GB2065885B/en
Priority to US06/202,464prioritypatent/US4376490A/en
Publication of JPS5673669UpublicationCriticalpatent/JPS5673669U/ja
Application grantedgrantedCritical
Publication of JPS6130932Y2publicationCriticalpatent/JPS6130932Y2/ja