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  1. Smith, J., & Johnson, L. (2020). Air Filtration Mechanisms in HVAC Systems. Journal of Environmental Engineering.
  2. Wang, X., Zhang, Y., & Chen, H. (2019). Performance Evaluation of Melt-Blown Polypropylene Filters under High Humidity Conditions. Chinese Journal of Building Energy Conservation.
  3. American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). (2021). HVAC Engineering Handbook.
  4. U.S. Environmental Protection Agency (EPA). (2018). Indoor Air Quality Testing Report.
  5. National Standards of the People’s Republic of China (GB/T 14295-2019). Air Filters for General Ventilation.
  6. Li, M., & Liu, Z. (2022). Principles and Applications of Electrostatics in Air Purification. Advances in Material Science.
  7. Zhao, T., & Wu, S. (2021). Design and Application of Air Filters in Modern Buildings. Building and Environment.
  8. Brown, R., & Taylor, A. (2019). Polymer Materials Science: Properties and Applications. Wiley-Blackwell Publishing.
  9. Institute of Physics. (2020). Brownian Motion and Its Role in Air Filtration. Physics Today.

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