片语
construction of impervious core防渗墻施工
dam core impervious material大坝心墻防渗掺合料
impervious s core不透水心墻
impervious sandy clay core砂质粘土防渗心墻
clay impervious core粘土防渗墻
Impervious Core Wall防渗心墻
Core impervious不透水心墻
concrete impervious core混凝土防渗墻
central impervious core dam防渗心墻坝