Main functions: 1. The lathe can machine big disc & special work pieces in Gap Bridge of bed. 2. The roughness of the parts which are finished by the lathe are up to 3.2μ M. 3. The accuracy of the dimension can reach IT7". 4. Two shaft sliding-gear transmission mechanism in the feed box has better rigidity. 5. The lathe apron has rapid traverse mechanism and controlled by single handle.