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мачта буровой установки

a portable mast constructed of tubular members. A pole mast may be a single pole, usually of two different sizes of pipe telescoped together to be moved or extended and locked to obtain maximum height above a well. Double-pole masts give added strength and stability. See mast.

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Penulis

  • enchantress
  • (Ukraine)

  •  (V.I.P) 16689 poin
  • 100% positive feedback
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