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Priority to JP3790974ApriorityCriticalpatent/JPS538541B2/ja
Priority to US05/496,828prioritypatent/US3943742A/en
Priority to DE19742440495prioritypatent/DE2440495B2/de
Publication of JPS50131653ApublicationCriticalpatent/JPS50131653A/ja
Publication of JPS538541B2publicationCriticalpatent/JPS538541B2/ja