Diffusion: Pretty Fantastic particles measuring below 0.one micron get bounced close to randomly and so are slowed by their interactions with atmospheric atoms and molecules. They inevitably drift or get bounced into a filter fiber, whereupon (over again) they stick within a procedure known as diffusion. กลิ่นไม่พึงประสงค์ เช่น ควันบุหรี่ น้ำเน่าริมทาง waiting for link from Social Network Posts (32)