China 22CrNi3Mo Thread Drill Rod Manufacturers - Best ...
The threaded drill rods, working with hydraulic drill rigs and hydraulic jumbos, have main threads of R22,R25,R28,R32,TR35,T38,T45,T51,ST58,ST68, T60, EL60 and EL68. The threaded drill rods are divided into MF rods and extension rods, which are widely used in open-pit mining, underground mining, tunneling, anchoring, furnace ...
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