结果根管治疗失败的主要原因为根管继发感染、根尖超填及根尖周机械损伤。
Results Secondary infection of the root tubes , apex overfilled and peripheral mechanical injury were main failure factors in the treatment of root tubes .
堆载预压法加固软土地基过程中，堆填速率将影响到超孔隙水压力的消散。
In the process of reinforcing soft soil foundation by preloading, preloading rate will impact on excess pore pressure dissipation.
针对超软粘土地基施工特点，提出新型塑料排水板打设装备的方案，该装备的开发对加快天津港吹填造陆进度具有重要意义。
According to the construction characteristics on the ultra-soft clay foundation, the proposal of adopting a new generation of plastic drainage plate-based equipment was proposed.
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