We are puzzled by the pervious to water, the underground coal seam fire prevention, the question of deep zone mining and coal mining from incidence in Jixi.
透水、地下煤层防灭火、深部开采问题、大倾角采煤已经成为困扰鸡西煤炭开采的技术问题。
We are puzzled by the pervious to water, the underground coal seam fire prevention, the question of deep zone mining and coal mining from incidence in Jixi.
透水、地下煤层防灭火、深部开采问题、大倾角采煤已经成为困扰鸡西煤炭开采的技术问题。
应用推荐