Drill Pipe, DTH Drill Pipe, Water Well Drill Pipe manufacturer / supplier in China, offering API 114mm DTH Water Well Drill Pipe for Drill Rig Machine, API 3 1/2′′if NC38 5 inch 127mm Good Quality Drill Pipe/Drill Rod, 76/ 89 /102 /114mm 3m/6m Down The Hole Water Well Drill Rod and so on.
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