underwall
基本解釋
- 底幫, 底板, 下盤
英漢例句
- By alternately disposing along vein and underwall outside-vein raises and designing new structures for runoff tracks,rib pillars can be stoped in step with chambers.
簡述了官地銀金礦傳統(tǒng)淺孔留礦采礦法應(yīng)用中存在的突出問題,即間柱滯后礦房回采,且占有礦量多,造成地壓集中顯現(xiàn)。