“孔底动力钻具”的概念、定义、翻译、参考文献-科学参考

单词	孔底动力钻具
释义	孔底动力钻具 Encyclopedia 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	period of alternating current period of an element period of an ergodic class period of an oscillation period of a semigroup period of a wave period of coefficients period of dormancy period of intercalary month period of light variation period of limitation of administrative litigation period of military government period of moon's node Period of Political Instruction Period of Political Instruction Constitution of Republic of China period of pseudorandom numbers period of revolution period of revolution, orbital period Period of Rex in Rome period of rotation Period of Southern and Northern Courts period of submergence tolerance period of translations periodogram periodogram analysis

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。