Deep excavation is a complex systematic project, just need a long-time, in-depth study.

深基坑工程是一个复杂的系统工程，还需长期、深入的研究。

youdao

Deep excavation is a complex systematic project, just need a long-time, in-depth study.

深基坑工程是一个复杂的系统工程，还需长期、深入的研究。

youdao