毫安（安培），伏特，毫安（安培），伏特，图片

p1Src=//y1.yzimgs.com/uploads/468888/2016729-10435020.png&p2Src=//y3.yzimgs.com/uploads/468888/2016729-104353170.png&p3Src=//y2.yzimgs.com/uploads/468888/2016729-104356770.png"

aa