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Priority to JP5042374ApriorityCriticalpatent/JPS5416440B2/ja
Priority to DE19752520206prioritypatent/DE2520206C3/de
Publication of JPS50143597ApublicationCriticalpatent/JPS50143597A/ja
Priority to US05/754,163prioritypatent/US4174178A/en
Publication of JPS5416440B2publicationCriticalpatent/JPS5416440B2/ja