“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	San José San José, Puerto San Juan San Juan del Sur Sankakuenshinju Mirrors Sankei Shimbun Sankeshu Sankra Sankra Variyar Sankt Gallen Sankt-Peterburg SanktVeitamFlaum Sanla Pubu Sanlian Life Weekly Sanlihe Sanlinyuan pilot settlement community Sanlisanbie San Li Tu,block-printed edition by Zhenjiang Prefecture School,second year of Chunxi era,Song Dynasty Sanli Tun San Liu (Ancient Qupai) Sanlixi irrigation canal San Lorenzo Church San Luis Potosí San Luis Potosí，Estado de San Lun

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