“螺杆钻具”的概念、定义、翻译、参考文献-科学参考

单词	螺杆钻具
释义	螺杆钻具 Encyclopedia 理学孔内钻具释 positive displacement motor drill螺杆钻具将钻井循环介质的液压能转化为机械能的容积式孔底动力钻具。简称螺杆钻。
随便看	weathered zone of coal Weather Forecast weather forecast for fishery weather forecasting weather index weathering weathering degree weathering fissure water weathering fluxes weathering intensity weathering rates weathering resistance of polymer materials weather modification weather modification model weather over the ocean weather proverb weather radar weather radar echo weather radar equation weather routing weather satellite weather system weave weaved photograph weaving

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。