Diffusion: Extremely High-quality particles measuring underneath 0.one micron get bounced all around randomly and are slowed by their interactions with atmospheric atoms and molecules. They finally drift or get bounced right into a filter fiber, whereupon (over again) they adhere in a very system referred to as diffusion. กลิ่นไม่พึงประสงค์ เช่น waiting for link from Social Network Posts (41)