Tip the bottle and jar enough to let a little air escape from the bottle so that the liquid is now up in the neck of the bottle and level with the water in the jar.
提示瓶和罐子，足以让一个小瓶子从空中逃脱这样，液体罐在目前的脖子，并在瓶中的水位。
2
When making the air reading in the burette, the level bottle should be raised so as to bring the liquid in the burette and level bottle to the same level.
当得到滴管中的气体读数，水平瓶应该升高，使滴管中的液体和水平瓶中的液体在相同的水平。
3
After evaporation of liquid oxygen, the air-supply system will offer pure oxygen without any pollution. Instead of industry oxygen bottle and provide patients with clean respiratory oxygen.