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Priority to JP5397474ApriorityCriticalpatent/JPS5621730B2/ja
Priority to GB1393975Aprioritypatent/GB1500757A/en
Priority to DE19752516026prioritypatent/DE2516026A1/de
Publication of JPS50145398ApublicationCriticalpatent/JPS50145398A/ja
Publication of JPS5621730B2publicationCriticalpatent/JPS5621730B2/ja