1) open pit and underground mine
露天地下开采
1.
Stability of boundary pillar of open pit and underground mine;
露天地下开采隔离层稳定性研究
2) the change from underground mining into open mining
地下转露天开采
4) changing underground into opencast mining
地下开采转露天开采
1.
The harmfulness of high step burst body and the prevention of its taking place during the initial stage of changing underground into opencast mining;
地下开采转露天开采初期高台阶爆裂体的危害与防治
5) Mining technology for transferring from open-pit mining to underground mining
露天转地下开采技术
6) openpit-underground mining
露天-地下联合开采
补充资料：露天
1.指室外。
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