closed pipe string

常见例句

雙語例句

• Armed at the lower productivity well that could not produce regularly, the closed pipe string and its matching tools were developed according to the theory of exploitation.
  針對低産能油藏（層）存在的供液能力差、油井無法正常生産的問題，根據開採低産能油井（層）的理論，研制了閉式配套琯柱及各種配套工具。
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