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Priority to JP11522976ApriorityCriticalpatent/JPS5340812A/ja
Priority to GB1615077Aprioritypatent/GB1581702A/en
Priority to DE19772717591prioritypatent/DE2717591C2/de
Publication of JPS5340812ApublicationCriticalpatent/JPS5340812A/ja
Publication of JPS5719676B2publicationCriticalpatent/JPS5719676B2/ja