1·Results of electrical survey using noncontact electrodes agree with that of other methods for shallow subsurface investigation.
结果表明，不接触电极电法在浅层探测中与其他电法探测结果一致。
2·When subsurface investigation reveals structural defects in the foundation area to be used for a structure, the foundation must be strengthened.
本地下勘探表明地基地区存在不良地层时，必须加固地基。