The mining group is Huainan Mining Bureau.
SDIC Xinji and Mining Bureau are both regular units, but the treatment is not as good as that of Mining Bureau.
There are new mines and old mines.
Hidden dangers of accidents, generally speaking, are confidential in mines.
Gas. . . . .
Every mine has gas. I think you are worried about the gas leak.
I'm not very angry now
Bibas is much more permeable.