行程开关，YBLX-HL/5030 上海临嘉科教仪器有限公司

p1Src=//y1shangxu.yzimgs.com/uploads/391770/20250116-96361951.jpg&p2Src=//y1shangxu.yzimgs.com/uploads/391770/20250116-02005395.jpg&p3Src=//y1shangxu.yzimgs.com/uploads/391770/20250116-92857742.jpg