China Nq Wireline Coring Drill Rods Suppliers ...
NQ Drill Rods Overview * Material : 4130 * Tubing • High quality alloy steel tubing • Consistent concentricity, straightness and heat treatment • All tubing available in DCDMA sizes * Thread • Tapered, course threads (3 threads per inch) provides easy make and break • Load efficiency of 30% provides sufficient strength for average ...
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