The selection of expressway bridge style in mountainous region is affected by many factors and is a complex problem.

山区高速公路的桥型选择受诸多因素的影响，是一个复杂的问题。

youdao

The selection of expressway bridge style in mountainous region is affected by many factors and is a complex problem.

山区高速公路的桥型选择受诸多因素的影响，是一个复杂的问题。

youdao