1) one mine with two faces
一矿二面
1.
By calculating and analysing the comprehensive efficacy of concentrative mining pattern of one mine with two faces for Changchun Coal Mine, the reasonable concentrative mining pattern is selected and the weak links of mine production are also found.
通过对常村煤矿“一矿二面”开采模式的计算分析，选出了合理的集中开采模式并找出了矿井生产的薄弱环节。
2) one mine one situation
一矿一面
3) one two time return ore
一、二次返矿
4) gold and copper deposits of the Ershiyizhan area
二十一站金、铜矿
5) upper cover
前封面(封一、封二)
补充资料：方铝矿(100)解理面STM图象
方铝矿(100)解理面STM图象
方铝矿(100)解理面S’FM图象 中国地质足学(北袁1供稿 59
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条