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2022

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09

T51-3660 thread drill pipe open-pit drill pipe

T51-3660 thread drill pipe open-pit drill pipe

T51-3660 Threaded drill pipe Open-pit drilling rig drill pipe

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Drill bit diameter: 89mm,102mm,115mm,127mm,152mm

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Production Process of Taper Drill Rod

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Drill bit diameter: 89mm,102mm,115mm,127mm,152mm

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Production Process of Taper Drill Rod

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