underground coal mining
... underground coal mining 地下采煤 underground coal mining method 地下采煤方法 Underground leaching mining technology 地下溶浸采矿技术 ...
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地下采煤方法 underground coal mining method
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地下采煤会导致地表下沉盆地的形成。
The surface subsidence basin is the result of underground coal mining.
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这些人在地下采煤。
These men work underground, mining for coal.
早期地下采煤的时候，矿井中的金丝雀常常拥有短暂而有价值的一生。
In the early days of underground coal mining, pit canaries often had short but valuable lives.
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