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Priority to JP10338778UpriorityCriticalpatent/JPS5522815U/ja
Priority to US06/004,604prioritypatent/US4264962A/en
Priority to DE19792902300prioritypatent/DE2902300A1/de
Priority to GB7904396Aprioritypatent/GB2013976A/en
Publication of JPS5522815UpublicationCriticalpatent/JPS5522815U/ja