短语词组短語swelling of soil 土壤膨脹swelling -shrinkage soil 膨脹土swelling soil roadbed 膨脹土路基swelling index of soil [土壤]土壤膨脹指數expansive soil swelling soil 土的分類膨脹土;膨脹土swelling soil ground 膨脹土地基 返回 swelling soil