Diffusion: Incredibly High-quality particles measuring beneath 0.1 micron get bounced all-around randomly and so are slowed by their interactions with atmospheric atoms and molecules. They sooner or later drift or get bounced right into a filter fiber, whereupon (another time) they adhere in the process known as diffusion. กลิ่นไม่พึงประสงค์ เช่น waiting for link from Social Network Posts (48)