Diffusion: Incredibly Wonderful particles measuring beneath 0.1 micron get bounced close to randomly and so are slowed by their interactions with atmospheric atoms and molecules. They eventually drift or get bounced into a filter fiber, whereupon (another time) they adhere in a course of action identified as diffusion. ขนาดเล็กกะทัดรัดสามารถวางไว้ได้หลายที่ หลายมุม https://www.mannature.com