The Panxian Dadong, with a mapped passage of 1660m long is a large karst cave system complicated by multi genesis of morphology.
盘县大洞是一个形态和成因复杂的大型喀斯特洞穴系统。
The Panxian Dadong, with a mapped passage of 1660m long is a large karst cave system complicated by multi genesis of morphology.
盘县大洞是一个形态和成因复杂的大型喀斯特洞穴系统。
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