core impervious material 心墙防渗料

dam core impervious material 大坝心墙防渗掺合料

impervious core 不透水心墙 ; 隔水核心

Impervious Core Wall 防渗心墙

concrete impervious core 混凝土防渗墙

central impervious core dam 防渗心墙坝

clay impervious core 粘土防渗墙

impervious s core 不透水心墙

construction of impervious core 防渗墙施工