单词hard-rock-mining
网络: 硬岩开采
A second form involves technology used for exploration boreholes in the hard rock mining industry.
小井眼的第二种形式包括使用了在采矿工业中使用的硬岩石中的勘探技术。
What if we were to say, no more hard rock mining?
如果有一天，我们不必再挖掘採矿？