The relationship between hydraulic condition and bubble point of bubble free aeration, as well as the effects of hydraulic condition and air pressure on aeration were also discussed.

对中空纤维膜无泡曝气进行了试验研究，考察了中空纤维膜的高效曝气性能，探讨了水力条件与无泡曝气泡点的关系，以及水力条件和曝气压强对曝气效果的影响。

youdao

Keep the windows closed and the air-conditioning on, giving you an allergen free bubble.

FORBES: Six Brands to Consider and Six Suggestions of What to Do When February Flowers Bring March Allergies