| 单词 | percussion drill |
| 释义 | percussion drill [pǝr`kǝsh·ǝn ´dril] MECHANICAL ENGINEERING A drilling machine usually using compressed air to drive a piston that delivers a series of impacts to the shank end of a drill rod or steel and attached bit. |
| 随便看 |
|
科学参考收录了103327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。