Drill Pipe, Casing Pipe, Drilling Equipment manufacturer / supplier in China, offering 89mm 3 1/2 Inch Used Drill Rod in Stock, 14 3/4"374.6mm Tricone Drill Bit /Tricone Rock Roller Bit, 9 1/2 Inch PDC Trenchless Drill Bit for Reamer Hole and so on.
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