“downhole motor”的概念、定义、翻译、参考文献-科学参考

单词	downhole motor
释义	downhole motor Encyclopedia 工学钻井装备释 downhole motor井下动力钻具连接在钻铤与钻头之间，随钻柱一起下入井底，驱动钻头旋转破岩的动力机。又称井下马达。理学钻具释 downhole motor孔底动力钻具位于钻柱下部，由钻井液（循环介质）或电力驱动，实现回转、冲击碎岩的钻具。
随便看	linear U(J) relation linear unbiased estimate linear unbiased estimator linear U relation linear variation linear variational method linear variety linear vector network analyzer linear vector space linear velocity linear velocity sensor linear vibration linear vibration theory linear video amplifier linear viscoelasticity linear viscoelastic model linear wave linear wave theory linear weak topology linear weighted moment linear weight sum method line asymmetry line at infinity lineation line attenuation

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。