Shanghai DHH screw compressor Co., LTD is high-tech enterprise, which specialized in the R&D and production and exporting of air compressor system equipment, and professionally produce screw air compressor and air purification equipment through the introduction of Germany advanced production technology and technology, which have many years experience in this field. Shanghai DHH always makes reform and innovation, after introducing foreign aircraft design and assembly process according to Asian high temperature and high environmental condition. DHH always make superior quality screw air compressor because of adopting international most advanced production technology and the most sophisticated technology. The main engine adopts the most advanced, efficient and reliable third generation of asymmetric rotor type line, the energy efficiency and reliability are in a leading level of the world