The covered karst is the great important engineering geologic problem recently discovered in Three Gorge Reservoir region.
三峡库区隐伏岩溶问题是近期发现的重大工程地质问题。
Tangshan city is the typical karst-cranny developing area in Huabei region which is shallowly covered up.
唐山市是华北地区典型的岩溶裂隙发育浅埋地区。
Tangshan city is the typical karst-cranny developing area in Huabei region which is shallowly covered up.
唐山市是华北地区典型的岩溶裂隙发育浅埋地区。
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