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Priority to JP1874372ApriorityCriticalpatent/JPS4887977A/ja
Priority to US00275693Aprioritypatent/US3805380A/en
Priority to DE2244319Aprioritypatent/DE2244319A1/de
Priority to NL7212341Aprioritypatent/NL7212341A/xx
Publication of JPS4887977ApublicationCriticalpatent/JPS4887977A/ja