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Priority to JP44103626ApriorityCriticalpatent/JPS5020724B1/ja
Priority to CH1913070Aprioritypatent/CH535136A/de
Priority to DE19702063623prioritypatent/DE2063623A1/de
Priority to US00322775Aprioritypatent/US3821977A/en
Publication of JPS5020724B1publicationCriticalpatent/JPS5020724B1/ja