If the underground eluvium is thick enough, the hard portion of it can be used as support layer of stake ends.
而厚度较

下残积土坚硬部分可作为桩端持力层。
质} residual soilIf the underground eluvium is thick enough, the hard portion of it can be used as support layer of stake ends.
而厚度较

下残积土坚硬部分可作为桩端持力层。
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