“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	diseases induced by chemical factor diseases induced by industrial dust diseases of adrenal medulla diseases of cruciferae pasture diseases of cyperaceae pasture diseases of external ear diseases of eyelid diseases of heart system diseases of laboratory animals diseases of laboratory guinea pig diseases of larynx diseases of pancreatic island diseases of pharynx Diseases of Poultry diseases of skin appendages diseases of standing milk-vetch Diseases of Swine diseases of Vicia disease spectrum disease surveillance Disease Theory disease trends diseconomies of agglomeration disenchantment disengagement

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