限位开关，XCKN2153P20C 上海临嘉科教仪器有限公司

p1Src=//y1.yzimgs.com/uploads/391770/20250116-45561951.jpg&p2Src=//y1.yzimgs.com/uploads/391770/20250116-45561951.jpg&p3Src=//y1.yzimgs.com/uploads/391770/20250116-17572062.jpg