Extension Drill Rod - hbsuperdrill.com
For extension drill rod, there are R22, R25, R28, R32, R38, T38, T45, T51, ST58, GT60 threads, and different lengths of rods are available from 600mm to 6400mm. Feature Of The ExtensionDrillRod MF Rod: Drill rod using thread system. Drilling precision can be further improved by using this as the first rod in a normal drill …
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