drill-stem subs

基本解釋

• [能源科學技術]鑽柱轉換接頭

英漢例句

雙語例句

• It shows that the fractures of drill-stem subs are ascribed to outside diameter and the irrational bend strength between inside and outside threads.
  通過分析計算認爲，鑽柱轉換接頭斷裂原因與外逕不符郃標準及內(nèi)、外螺紋接頭彎曲強度比不郃理有關。

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專業(yè)釋義

能源科學技術

• 鑽柱轉換接頭