one of the 5 enterprises producing biggest hydraulic excavators in the world, is the only excavator manufacturer with the capability of studying and producing the fully hydraulic excavators with a unit weight from 8t to 185t in China. As a industry enterprise of science and technology in Sichuan province, the company with more than 40 years of production experience has the only state-class Enterprise Technology Center in domestic same professional line and has been authorized by the nation to do export and import independently.