行程开关，D4CC-4033 JNR372- 上海临嘉科教仪器有限公司

p1Src=//y1.yzimgs.com/uploads/391770/20250116-50333862.jpg&p2Src=//y1.yzimgs.com/uploads/391770/20250116-61951739.jpg&p3Src=//y1.yzimgs.com/uploads/391770/20250116-71836520.jpg