The R22, R25, R28, R32, R38, T38, T45, and T51 are internationally recognized codes for a range of threaded drill rods, categorized primarily into two families: the R-series (generally for top-hammer ...Veja mais
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Threaded Drill Pipe R22 R25 R28 R32 R38 T38 T45 T51 Wear Resistant Rock Drill Extension Rod