The thesis presents the application of surface pre-grouting to construction of auxiliary shaft in Yangliu coalmine.

本文介绍了地面预注浆施工技术在杨柳煤矿副井中的应用。

youdao

The thesis presents the application of surface pre-grouting to construction of auxiliary shaft in Yangliu coalmine.

本文介绍了地面预注浆施工技术在杨柳煤矿副井中的应用。

youdao