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Drill stem

All members in the assembly used for rotary drilling from the swivel to the bit, including the kelly, the drill pipe and tool joints, the drill collars, the stabilizers, and various specialty items. Compare drill string.

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创建者

  • Harry8L
  • (London, United Kingdom)

  •  (V.I.P) 574128 分数
  • 100% positive feedback
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