Jiangsu JSH Dust Purification Co.,ltd established in 2004,we have more than 10 years experience of producing mining equipments, It is a company specializing in research, manufacture and sale positive pressure air ducts、negative pressure air ducts、tunnel ventilation ducts and other zipper(with sealing flap)air ducts.From 2010,we decided to extend the range to other mining products,such as PVC fabric for ducting,Dust Extraction Stainless Steel Spiral Jet,Waterproof Tarpaulin.