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Priority to JP4173073ApriorityCriticalpatent/JPS5411903B2/ja
Priority to DE19732345563prioritypatent/DE2345563C3/de
Priority to IT5246973Aprioritypatent/IT994237B/it
Publication of JPS49128276ApublicationCriticalpatent/JPS49128276A/ja
Publication of JPS5411903B2publicationCriticalpatent/JPS5411903B2/ja