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Priority to JP1976057112UpriorityCriticalpatent/JPS5548102Y2/ja
Priority to GB16392/77Aprioritypatent/GB1521957A/en
Priority to FR7712447Aprioritypatent/FR2349033A1/fr
Publication of JPS52147810UpublicationCriticalpatent/JPS52147810U/ja
Priority to US06/005,012prioritypatent/US4224918A/en
Application grantedgrantedCritical
Publication of JPS5548102Y2publicationCriticalpatent/JPS5548102Y2/ja