Diffusion: Extremely fine particles measuring down below 0.one micron get bounced about randomly and are slowed by their interactions with atmospheric atoms and molecules. They inevitably drift or get bounced right into a filter fiber, whereupon (over again) they adhere in the approach known as diffusion. ตัวเครื่องอาจค่อนข้างใหญ่ไปสำหรับผู้ใช้บางท่าน The Core three https://www.mannature.com