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一、装置的制作: 取两个塑料眼药瓶,截去瓶底和尖嘴部分。在瓶嘴上,分别按上长约3～4cm的玻璃管和一个尖嘴玻璃管,将一塑料眼药瓶底放在沸水
First, the production of the device: Take two plastic eye medicine bottle, cut off the bottom of the bottle and tip part. On the mouth of the bottle, a glass tube with a length of about 3 to 4 cm and a glass tube with a pointed tip are pressed respectively, and the bottom of a plastic eye bottle is placed in boiling water.