在立井井筒施工中，采取中深孔爆破施工方法，是立井快速施工的有效途径。

In shaft construction, using the method of middle-deep hole explosion can fast and effective build shaft.

youdao

在立井井筒施工中，采取中深孔爆破施工方法，是立井快速施工的有效途径。

In shaft construction, using the method of middle-deep hole explosion can fast and effective build shaft.

youdao