Diffusion: Pretty fine particles measuring beneath 0.one micron get bounced all around randomly and therefore are slowed by their interactions with atmospheric atoms and molecules. They ultimately drift or get bounced into a filter fiber, whereupon (yet again) they stick inside of a approach known as diffusion. จัดส่งฟรี! เมื่อสั่งซื้อเครื่องกรองอากาศทุกรุ่น That https://www.mannature.com