Diffusion: Pretty Fine particles measuring under 0.1 micron get bounced all around randomly and so are slowed by their interactions with atmospheric atoms and molecules. They ultimately drift or get bounced into a filter fiber, whereupon (another time) they adhere in the course of action known as diffusion. กลิ่นไม่พึงประสงค์ เช่น https://www.mannature.com/products/detail/airpurifier