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。
The concentrated expression of parking difficult problem in cities is construction and management of public parking lot.
城市停车难问题集中表现在城市公共停车场建设和管理问题上。
The geological prediction of tunnel is an important problem for construction quality and safety, and also a difficult object for engineering geophysics.
隧道地质超前预报关系到隧道工程施工质量和安全，是国内外研究的前缘课题，也是工程地球物理研究中的疑难问题之一。
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