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Priority to JP18277985UpriorityCriticalpatent/JPS6291404U/ja
Priority to DE3630393Aprioritypatent/DE3630393C2/de
Priority to GB8621706Aprioritypatent/GB2181298B/en
Priority to US06/905,392prioritypatent/US4805296A/en
Publication of JPS6291404UpublicationCriticalpatent/JPS6291404U/ja