Diffusion: Very high-quality particles measuring under 0.1 micron get bounced about randomly and are slowed by their interactions with atmospheric atoms and molecules. They ultimately drift or get bounced right into a filter fiber, whereupon (over again) they stick in a very course of action named diffusion. มีขนาดกะทัดรัด พกพาไปใช้งานได้อย่างสะดวกในทุกที่ In https://www.mannature.com