Drilling Rig, Water Well Drilling Rig, Borehole Drilling Machine manufacturer / supplier in China, offering Thd 1000RC Drilling Rig VFD Compatible Bd6a Hydraulic Motor 3000ml/Rev Displacement Precision Speed Control, Thd 1000RC Drilling Rig Bd Series Sliding Bearing Motor Ultra Low Friction Design 50, 000h Service Life, Thd 1000RC Drilling Rig Marine Grade Bd Hydraulic Motor Corrosion-Resistant Coating for Offshore Drilling Equipment and so on.