Drilling Rig, Drill Bits, DTH Drill Rig manufacturer / supplier in China, offering 14bar Portable Trailer Xvas900 Air Compressor for Water Well Mine Rock Drill Diesel Engine, Hammer Bits Rock Drilling Bits 115mm DTH Hammer Bit, Good Price 9 7/8" 250mm IADC 537 Hard Rock TCI Tricone Bit and so on.