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Priority to JP1976131746UpriorityCriticalpatent/JPS6143311Y2/ja
Priority to GB21126/77Aprioritypatent/GB1565756A/en
Priority to US05/800,627prioritypatent/US4126800A/en
Priority to US05/800,544prioritypatent/US4128819A/en
Publication of JPS5471934UpublicationCriticalpatent/JPS5471934U/ja
Application grantedgrantedCritical
Publication of JPS6143311Y2publicationCriticalpatent/JPS6143311Y2/ja