慢位开关，HQSD-56U10 CWL569- 上海临嘉科教仪器有限公司

p1Src=//y1shangxu.yzimgs.com/uploads/391770/20250116-70736520.jpg&p2Src=//y1shangxu.yzimgs.com/uploads/391770/20250116-30705317.jpg&p3Src=//y1shangxu.yzimgs.com/uploads/391770/20250116-99296942.jpg