With the development of science and technology and the increase of economy, more and more internal cities begin their exploitation and usage of city geo-space and get a series of productions.

随着科技水平的进步和经济实力的增强，国内越来越多的城市开始地下空间的开发利用，取得了一系列成果。

youdao

With the development of science and technology and the increase of economy, more and more internal cities begin their exploitation and usage of city geo-space and get a series of productions.

随着科技水平的进步和经济实力的增强，国内越来越多的城市开始地下空间的开发利用，取得了一系列成果。

youdao