“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	applique appliqué apply for retrial APP of museum appointed guardian Appointment by Protection appointment of officials to the capital or outer provinces appointment or in-office service of an official in mourning appointment system appointment system of professional and technical positions of library Appomattox Surrender apportioned purchase apportionment of heat by area apportionment of heat by on-off control appraisal appraisal analysis method appraisal and evaluation of pollution damage appraisal center for environment and engineering，ministry of ecology and environment appraisal methodology appraisal of calligraphy and painting appraisal of clinical practice guideline appraisal of collection appraisal of digital materials appraisal of electronic records appraisal of pottery and porcelain

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。