Drilling Rig Parts, Workover Rig, Drilling Drawworks manufacturer / supplier in China, offering Zj30CZ-04-01-00 Positive and Reverse Gearbox for Xj750 Workover Rig and Zj30/Zj40 Drilling Rig, Premium Lower Chain Gearbox Z06020000040AA for Zj20/Zj30/Zj40 Drilling Rig Operations, High-Performance Compound Transfer Gearbox Z01030000040AA for Zj30/Zj40 Drilling Rigs and so on.