New Karst Sinkhole Formation Mechanism Discovered in a Mine Dewatering Area in Hunan, China; 采矿疏水区现代岩溶陷落柱发育机理(中国湖南); Entdeckung eines neuen Mechanismus der Bildung von Karsteinbruchtrichtern in einem Bergbauentwässerungsgebiet in Hunan, China; Nuevo mecanismo de formación de un sumidero cárstico descubierto en una mina en Hunan, China;

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