限位开关，D4C-1220 上海临嘉科教仪器有限公司

p1Src=//y1.yzimgs.com/uploads/391770/20250116-30705317.jpg&p2Src=//y1.yzimgs.com/uploads/391770/20250116-30705317.jpg&p3Src=//y1.yzimgs.com/uploads/391770/20250116-70736520.jpg