The feasibility of which short-hole shrinkage method is used for mining of low-grade and submarginal ores in Huanren Mine is demonstrated in this paper.
英
美
释义
论证了采用浅孔留矿法对桓仁矿北岔区的低品位矿及表外矿进行综合回收的可行性。
把海词放在桌面上,查词最方便
触屏版
|
电脑版
©2003 - 2025 海词词典(Dict.cn)
立即下载