单项选择题
A.JV-862-XXXX-1 B.JV-882-XXXX-1 C.JV-872-XXXX-1 D.JV-886-XXXX-1
A.90±3V B.100±3V C.77±3V D.120±3V
A.输出欠压 B.输入欠压 C.输入过压 D.输出过流