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Priority to JP17686780UpriorityCriticalpatent/JPS6344293Y2/ja
Priority to GB8117096Aprioritypatent/GB2092251B/en
Publication of JPS5798962UpublicationCriticalpatent/JPS5798962U/ja
Priority to US06/712,463prioritypatent/US4594854A/en
Application grantedgrantedCritical
Publication of JPS6344293Y2publicationCriticalpatent/JPS6344293Y2/ja