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Priority to JP1977046522UpriorityCriticalpatent/JPS5726127Y2/ja
Priority to GB2081/78Aprioritypatent/GB1595616A/en
Priority to US05/870,821prioritypatent/US4230470A/en
Publication of JPS53141841UpublicationCriticalpatent/JPS53141841U/ja
Application grantedgrantedCritical
Publication of JPS5726127Y2publicationCriticalpatent/JPS5726127Y2/ja