In order to improve the driving comfort and convenience of transportation,we have developed this series of Air Springs for Trucks and have obtained outstanding results. In the use of air spring,it is convenient to lower or to raise the vehicle body in loading up and unloading of cargoes . Its low self-damping frequencies reduces the impact to the road surface and protects the car body and various car parts,also the fragile goods in transit. ,playing down the maintenance costs, extending the life of vehicles.