Soft groundwork disposal is a difficult problem in the freeway construction.
软基处理是高速公路建设中的一个难点问题。
In the highway construction on soft foundation, "bump at bridge-head" is a difficult technical problem.
在软土地基修建高等级公路中，“桥头跳车问题”是一个技术难题。
In the highway construction on soft foundation, "bump at bridge-ends" is a difficult technical problem.
在软土地基修建高等级公路中，“桥头跳车问题”是一个技术难题。
The crack of concrete slab is a difficult problem in the design and construction.
混凝土面板裂缝一直是面板设计与施工中的一个难题。
The crack of concrete slab is a difficult problem in the design and construction.
混凝土面板裂缝一直是面板设计与施工中的一个难题。
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