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Application filedfiledCritical
Priority to JP1975074074UpriorityCriticalpatent/JPS554461Y2/ja
Priority to US05/691,829prioritypatent/US4057937A/en
Priority to GB22610/76Aprioritypatent/GB1511755A/en
Publication of JPS527131UpublicationCriticalpatent/JPS527131U/ja
Application grantedgrantedCritical
Publication of JPS554461Y2publicationCriticalpatent/JPS554461Y2/ja