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High-quality downhole drilling series products, 43mm,45mm drill bits;

High-quality downhole drilling series products, 43mm,45mm drill bits; H35,3700mm,4305mm boring drill rod; 76mm,89mm,102mm reaming drill bit; T38 thread drill tail.


High quality underground excavation drilling series products,43mm,45mmDrill bit;H35,3700mm,4305mmBoring rod;76mm,89mm,102mmReaming bit;T38Thread drill tail.