Diffusion: Incredibly Fine particles measuring beneath 0.1 micron get bounced around randomly and are slowed by their interactions with atmospheric atoms and molecules. They sooner or later drift or get bounced into a filter fiber, whereupon (over again) they stick in the course of action termed diffusion. กิจกรรมเพื่อสาธารณะประโยชน์ของบริษัท ช่วยฆ่าเชื้อโรค กำจัดฝุ่น https://www.mannature.com