气举法在曹妃甸矿石码头大直径超深钢管桩清除桩心土中的应用
기거법재조비전광석마두대직경초심강관장청제장심토중적응용
Application of Pneumatic Lifting Method to Remove Bore Material from Large Diameter and Very Deep Steel Tubular Piles for Caofeidian Ore Terminal
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