然而在厚度不均的抛石棱体层中进行冲孔灌注桩施工，在我国工程建设史上还不多见。
But, construction of punched cast-in-situ piles in rubble-mound layer of uneven thickness is still rare in China's engineering history.
然而在厚度不均的抛石棱体层中进行冲孔灌注桩施工，在我国工程建设史上还不多见。
But, construction of punched cast-in-situ piles in rubble-mound layer of uneven thickness is still rare in China's engineering history.
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