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Continuous Flight Auger Drilling Rig Accessories High Strength Good Performance

Continuous Flight Auger Drilling Rig Accessories High Strength Good Performance

Continuous Flight Auger Drilling Rig Accessories High Strength Good Performance

Accessories-Drill Rod Interlocking Kelly bar Interlocking Kelly bar is located at the upper end of the drill string. It can be divided into square and hexagonal. In well drilling, when drilling, the ...

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