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Priority to JP1909168ApriorityCriticalpatent/JPS482373B1/ja
Priority to US808792Aprioritypatent/US3538419A/en
Priority to DE19691914875prioritypatent/DE1914875A1/de
Priority to GB1264538Dprioritypatent/GB1264538A/en
Publication of JPS482373B1publicationCriticalpatent/JPS482373B1/ja