Rock Drill Bit for Mining and Well Borehole, Rock Drill Rod for Tunneling and Open Mining, Tricone Roller Bit and PDC Drag Bit for Borewell manufacturer / supplier in China, offering Quarrying and Profiling Diamond Wire Saw Rope for Marble Granite and Sandstone, Hex22/Hex25*108mm/159mm Shank Taper Drill Rod, Two Cutter Wings Tungsten Carbide Coal Mining Drill Bit and so on.