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Priority to JP2230276UpriorityCriticalpatent/JPS52114756U/ja
Priority to DE19772707337prioritypatent/DE2707337A1/de
Priority to GB7837/77Aprioritypatent/GB1537423A/en
Priority to US05/772,566prioritypatent/US4127984A/en
Publication of JPS52114756UpublicationCriticalpatent/JPS52114756U/ja