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Priority to JP5258869ApriorityCriticalpatent/JPS4941803B1/ja
Priority to US875683Aprioritypatent/US3697087A/en
Priority to DE19691957094prioritypatent/DE1957094A1/de
Priority to GB1295466Dprioritypatent/GB1295466A/en
Publication of JPS4941803B1publicationCriticalpatent/JPS4941803B1/ja