1制作材料大号可乐瓶2只,直玻璃管1根,直角玻璃管2根,橡胶塞2个,橡胶管2段,两通控制阀2个,导管,冷水等。2制作方法①在2只橡胶塞上用打孔器分别打2个孔。②在2只橡胶塞上分别装上直玻璃管和直角玻璃管(图1)。③在直角玻璃管上分别安装两通控制阀。④将2只橡胶塞分别装在2只大号 1 The production materials include 2 large Coke bottles, 1 straight glass tube, 2 right-angled glass tubes, 2 rubber stoppers, 2 rubber tubes, 2 control valves, 2 catheters, and cold water. 2 Production Method 1 Two holes were punched in two rubber stoppers with a hole punch. 2 Install straight glass tubes and right-angle glass tubes on two rubber stoppers (Figure 1). 3 Install two-way control valves on the right-angle glass tube. 4 Install 2 rubber stoppers in 2 large