... 2,ISO9001:2000,CE,EN779 certification. 3,low resisitance,high capacity. 4,3-D net structure,dust-holding Ankelin ... manufacture super-thin fiber filtering media with high quality and excellent technical.1, As a kind of ... Even distribution, soft, dense, high strength,low resistanceand high efficiency.3, Acid-resistance, alkali-resistant, high melting point (167-174)°c, and stable ...