“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	Battle of Al-Alamayn Battle of Annam Battle of An Nanguo battle of Annual Battle of Antietam Battle of Arroyo Grande Battle of Atakpamé Battle of Ayacucho Battle of Baekgang Battle of Baideng Battle of Baitag Bogd Battle of Beijing (1644) Battle of Beliliou Battle of Blood River Battle of Bull Run Battle of Bunker Hill Battle of Calderón Bridge Battle of Carabobo Battle of Caseros Battle of Chaldiran Battle of Champa Battle of Chancellorville Battle of Chateauguay Battle of Chaumuhtao Battleof Crysler’s Farm

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。