行程开关，YBLX-HL/5050 上海临嘉科教仪器有限公司

p1Src=//y1shangxu.yzimgs.com/uploads/391770/20250116-63038617.jpg&p2Src=//y1shangxu.yzimgs.com/uploads/391770/20250116-92857742.jpg&p3Src=//y1shangxu.yzimgs.com/uploads/391770/20250116-38628428.jpg