Bop, Mud Pump, Casing Centralizer manufacturer / supplier in China, offering API 5dp Certified 6-5/8 Inch Drill Pipe with High-Strength Alloy Steel for Deep Well Drilling, Premium API 7-1 3 1/2 Inch Nc38 Heavy Weight Drill Pipe, API 16A Bop Single RAM Bop and so on.
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