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Priority to JP6117279UpriorityCriticalpatent/JPS5578982U/ja
Priority to GB8015158Aprioritypatent/GB2052809B/en
Priority to CH361680Aprioritypatent/CH640389B/fr
Publication of JPS5578982UpublicationCriticalpatent/JPS5578982U/ja
Priority to US06/430,426prioritypatent/US4436435A/en