Recently, there is a tendency to use pre-stressed anchorage-cable concrete to line tunnel.

近年来，在我国有采用预应力锚索混凝土衬砌隧洞的趋势。

youdao

Recently, there is a tendency to use pre-stressed anchorage-cable concrete to line tunnel.

近年来，在我国有采用预应力锚索混凝土衬砌隧洞的趋势。

youdao