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Priority to JP2362667ApriorityCriticalpatent/JPS522998B1/ja
Priority to NL6804998Aprioritypatent/NL157656B/xx
Priority to FR1580214Dprioritypatent/FR1580214A/fr
Priority to GB1793868Aprioritypatent/GB1224893A/en
Priority to MY7400129Aprioritypatent/MY7400129A/xx
Publication of JPS522998B1publicationCriticalpatent/JPS522998B1/ja