French officials say a fire in the Channel Tunnel is now largely extinguished but firefighters are still working to lower the temperature and cool down secondary blazes.
法国官员说，连接英国与法国的海底火车隧道的大火已经基本扑灭，但是消防人员仍然在努力降低温度并熄灭后续引发的火焰。
She is the first and only female miner working below underground in South Africa, and has to crawl on her belly for 3 kilometers through a muddy tunnel every morning.
在南非，她是第一位也是唯一一位下井作业的女矿工。为此，每天早晨她不得不沿着泥泞的巷道爬行3公里。
This paper proposes a new working face ventilation system: top gas tunnel small pillar outside the bottom return air laneway layout, in other words, which is gas tunnel location evolution.
本文提出了一种全新的综放工作面通风系统：顶层瓦斯巷小煤柱外错底层回风顺槽布置，具体是一种放顶煤工作面顶板排瓦斯巷位置的改进。
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