变压器，BK-500VA(铜) 3-2/220 上海临嘉科教仪器有限公司

p1Src=//y1.yzimgs.com/uploads/391770/20250116-02005395.jpg&p2Src=//y1.yzimgs.com/uploads/391770/20250116-92857742.jpg&p3Src=//y1.yzimgs.com/uploads/391770/20250116-08370075.jpg