短语词组短语swelling of soil 土壤膨胀swelling -shrinkage soil 膨胀土swelling soil roadbed 膨胀土路基swelling index of soil [土壤]土壤膨胀指数expansive soil swelling soil 土的分类膨胀土;膨胀土swelling soil ground 膨胀土地基 返回 swelling soil