Anhui Clean Energy Co., Ltd. as known as LD brand is a national high-tech enterprise ,specializing in the R&D, production and sales of CNG cylinders for vehicle (CNG-1.CNG-2.CNG-3.CNG-4)，CNG gas storage cylinder bundles，CNG frame assemblies ,gas supply systems, as well as seamless steel gas cylinders (industrial gas cylinders, fire-fighting gas cylinders) and LPG composite gas cylinders.