The phenomenon of present ground fissures have been discovered in many countries in the world, the frequency and the degree of disaster are anabatic year by year.

  • 现代地裂缝现象在世界许多国家都有发现,其发生频率和灾害程度逐年加剧。

  • 互联网摘选 2025-01-19 23:51:29

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