drill-stem subs

基本解释

• [能源科学技术]钻柱转换接头

英汉例句

双语例句

• It shows that the fractures of drill-stem subs are ascribed to outside diameter and the irrational bend strength between inside and outside threads.
  通过分析计算认为，钻柱转换接头断裂原因与外径不符合标准及内、外螺纹接头弯曲强度比不合理有关。

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专业释义

能源科学技术

• 钻柱转换接头