As there was no evidence that hazardous waste was buried at the mine, investigators speculate that the source of dioxins may be natural, perhaps due to a prehistoric forest fire.
由于没有证据表明该矿埋有危险废物，调查者认为该例二恶英的来源可能是一个自然过程，也许归因于史前森林大火。
This paper briefly introduces some measures to waste water treatment of hydrometallurgical mill of Uranium Mine No. 754.
本文扼要介绍了七五四矿水冶厂废水治理中采取的一些措施。
The study of mine water source heat pump is still in its infancy domestic, and there was no report of the use of mine waste heat back to the wind.
国内对矿井水源热泵的研究尚处于起步阶段，对矿井回风废热的利用未见有报道。
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