drill-stem subs

基本解释

• [能源科學技術]鑽柱轉換接頭

英汉例句

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、外螺紋接頭彎曲強度比不郃理有關。

• drill-stem subs更多例句

专业释义

能源科學技術

• 鑽柱轉換接頭