Diffusion: Extremely good particles measuring beneath 0.one micron get bounced all around randomly and they 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 very system identified as diffusion. มีการรับประกันและบรการหลังการขายที่เชื่อมั่น That third https://www.mannature.com