火区下部空区和燃烧中心区的勘探在煤田火区环境治理过程中十分重要，常规的勘探方法难以解决。
The detection of cavities and burning hotspots under the fire zone are very important during the coal fire fighting process, which could hardly be solved by the conventional detection technologies.
在这个环境中有一个特定的中心点，声音和图像由其开始，慢慢地向边缘的屏幕扩散。在此过程中，人们能感受到的是一种“视觉辐射”的感觉。
It has a dedicated centre, from which the sounds and images originate and from there then flicker from screen to screen, towards the edges, emanating a sense of "visual radiation".
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