| 单词 |
half-header |
| 释义 |
half-header half-header[′haf ¦hed·ər] (mining engineering) A large cap piece; used by sawing a header in two and placing, generally, two timbers under the half header on one side of the haulage, with the end extending over the haulage. |
| 随便看 |
- july 17, 2019
- july 17, 2020
- july 17, 2021
- july 17, 2022
- july 17, 2023
- july 17th
- july 18
- july-18
- july 18, 2011
- july 18, 2012
- july 18, 2013
- july 18, 2014
- july 18, 2015
- july 18, 2016
- july 18, 2017
- july 18, 2018
- july 18, 2019
- july 18, 2020
- july 18, 2021
- july 18, 2022
- july 18, 2023
- july 18th
- july 19
- july 19, 2011
- july 19, 2012
|