Drilling Rig, Drill Bits, DTH Drill Rig manufacturer / supplier in China, offering Mine Drilling Rig 600m Depth Drilling Machine Xy-3 for Geological Exploration Borehole, Hard Rock Drilling/Drill DTH Hammer and Bit for High Pressure Air Drilling, High Performance Steel Body Small PDC Drilling/Drill Bit with 4/5/6/8 Blades and so on.