Core Drilling Rig, Water Well Drilling Rig, Rock Drilling Rig manufacturer / supplier in China, offering Mayhew Threads Drill Rods 76-254 mm Diameter with Friction Welded Tool Joints for Rotary Drilling, 2 -7/8" Mayhew Junior Threads Friction Welded Drill Rod Drill Pipe, Mayhew Junior 2 3/8 Threads Mayhew Junior Drill Rods for Water Well Drilling and so on.
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