“drag bit”的概念、定义、翻译、参考文献-科学参考

单词	drag bit
释义	drag bit Encyclopedia 工学钻井装备释 drag bit刮刀钻头以刮削方式破碎井底岩石的、带有刮刀片的钻头。
随便看	downhole bums down hole electric heating downhole electrodrill downhole junk downhole motor down hole motor drilling downhole operation downhole pressurized jet assisted drilling system downhole throttling method downhole throttling technology down-hole tool Downing Park down-ladder down-ladder operator downlead down-leg light time downlink download down mattres down pillow downpour down-punching type down quark downsampling downshift

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。