“down hole motor drilling”的概念、定义、翻译、参考文献-科学参考

单词	down hole motor drilling
释义	down hole motor drilling Encyclopedia 理学钻探理论释 down hole motor drilling孔底动力钻进利用置于钻孔底部的孔底动力钻具直接驱动钻头破碎岩石的钻进方法。
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