Therefore, to research the overburden's destructive rules, especially the water suture zone's height i.

因此，研究覆岩破坏规律，特别是导水裂缝带的高度就显得极为重要。

youdao

Therefore, to research the overburden's destructive rules, especially the water suture zone's height i.

因此，研究覆岩破坏规律，特别是导水裂缝带的高度就显得极为重要。

youdao