1.The patents of only two oil channels with double sealed in the
rotating-head
2.The patented back-up wrench and its fixed structure
3.The patented guide rail has Single-lock fastening structure
4.The heavy load AC motors with variable frequency control
system
5.The opticalã€mechanicalã€electricalã€hydraulicã€communication
integration control system
6.The dual load channels improve the service life of bearings and
main shaft
7.Integrated hydraulic systems and oil tank reduce system heat
