Serious necking quality problems often appear when the CFG piles construction technology of long spiral drill pipe by pump pressure apply in some disturbed sensitive soil areas of Taiyuan.
长螺旋钻管内泵压CFG桩施工技术在太原部分地区扰动敏感性土中应用时，常出现严重缩径质量问题。
Serious necking quality problems often appear when the CFG piles construction technology of long spiral drill pipe by pump pressure apply in some disturbed sensitive soil areas of Taiyuan.
长螺旋钻管内泵压CFG桩施工技术在太原部分地区扰动敏感性土中应用时，常出现严重缩径质量问题。
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