| 单词 | headboard |
| 释义 | headboard [`hed´bȯrd] MINING ENGINEERING 1. A wooden wedge placed against the hanging wall, and against which one end of the stull is jammed. 2. A board in the roof of a heading, contacting the earth above and supported by a headtree on each side. |
| 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。