An unidentified man searches for tin ore at a sub-Saharan mine.
在撒哈拉以南的矿区,一位身份不明的男子正在寻找锡矿。
The cause of mine pillar destruction in in Dachang Tongkeng Tin Mine was analyzed from observation by photoelastic stressmeter embedded in mine stope 570.
通过对埋设于570中段光弹性应力计的观测,分析了该中段矿柱破坏的情况及原因。
We once worked a tin mine here.
我们有一次在这里办了一个锡矿。
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