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Priority to JP10708778UpriorityCriticalpatent/JPS5524712U/ja
Priority to US06/035,566prioritypatent/US4234773A/en
Priority to DE19792917977prioritypatent/DE2917977A1/de
Priority to GB7916780Aprioritypatent/GB2022321B/en
Publication of JPS5524712UpublicationCriticalpatent/JPS5524712U/ja