Gongyi Shengxin Filter Material Industry: Our water treatment material products are primarily used by enterprises and institutions of all sizes in water treatment, and some product names have been listed in the following publications: "Manual of Water Supply and Drainage Design" Volume 3 (After color plate, page 1) Volume 12 (Equipment and Devices) (P523-538), "China Water Industry Yellow Pages" (2001-2002, P208, 277), "Directory of China's Urban Water Supply Industr...