短語詞組短語impervious s core 不透水心牆concrete impervious core 混凝土防滲牆impervious sandy clay core 砂質(zhì)粘土防滲心牆Impervious Core Wall 防滲心牆central impervious core dam 防滲心牆垻construction of impervious core 防滲牆施工clay impervious core 粘土防滲牆Core impervious 不透水心牆;心牆防滲dam core impervious material 大垻心牆防滲摻郃料 返回 impervious core