本文通过对哈大高速铁路局部地段的路基和桥梁进行沉降观测，以对其安全性提供参考依据。

This article give a detailed description on settlement observation for roadbedand bridge, to provide reference basis for its safety.

youdao

本文通过对哈大高速铁路局部地段的路基和桥梁进行沉降观测，以对其安全性提供参考依据。

This article give a detailed description on settlement observation for roadbedand bridge, to provide reference basis for its safety.

youdao