cdddd:https://www.netkao.com/shiti/49462/48201626471.html
EQw7(r|v: https://wenku.baidu.com/view/6faa2f5114fc700abb68a98271fe910ef12daeb5.html
k\dPF@~Hvl 怎样区分岩石强风化,中风化和弱风化
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