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Thread Hexagonal T38 T45 T51 Gt60 EL60 Mf mm Extension Drifter Speed Drill Rod for Drifting and Tunnelling

Thread Hexagonal T38 T45 T51 Gt60 EL60 Mf mm Extension Drifter Speed Drill Rod for Drifting and Tunnelling
Product DescriptionExtension rods are made by hollow drill steels; there are two shapes of extension rods, round type...

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