Petroleum Machinery, Fishing Tool manufacturer / supplier in China, offering API Spiral Heavy Weight Drill Pipe Oilfield Downhole Welded Drill Stem Tool Hwdp AISI 4145h, API 5dp 7-1 Standard Oil Well Drill Pipe Steel Drill Stem Pipe Down The Hole Drilling Tools, API 5DP Standard Flat Drill Pipe String 2-3/8" to 6-5/8" Water Well Drill Rod Stem Equipment and so on.
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