PDC Bit, Tricone Drill Bit, DTH Hammer manufacturer / supplier in China, offering 76mm 93mm 112mm 132mm 151mm Auger Coring PDC Diamond Drill Bit, Water Well Drilling Mining High Air Pressure 3" 4" 5" 6" 8" 10" Inch Down The Hole Hammer DTH Hammer, 17 1/2 Milled Steel Tooth Mining TCI Tricone Three Cone Rock Roller Drill Bit and so on.