China Customized Dth Drill Rods Manufacturers, Suppliers ...
Dth Drill Rods. DTH drill rods DTH drill rods Outside Diameter: 76, 89, 102,114, 127, 140mm Wall Thickness: 6.5mm/8.5mm/10mm Thread: API Method: friction welding Length: can be made as customer's demand Use: geothermal, mining, construction, water well drilling DTH drill rods is mainly used in the drilling...
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