短語(yǔ)詞組短語(yǔ)impervious s material 不透水物料impervious earth material 防滲土料impervious liner material 防滲襯層材料dam core impervious material 大垻心牆防滲摻郃料hard impervious material 堅(jiān)硬不透水物料core impervious material 心牆防滲料A material impervious to water 不透水的材料 返回 impervious material