<正> Compared chemical bonds change situation of coal surface and oxygen mole- cules before and after coal surface adsorption to three oxygen molecules,after ad
<正> The dynamic updating of the model included: the change of space border,addi- tion and reduction of spatial component (disappearing,dividing and merging),th
<正> The impact on these water bodies of the surrounding coal production activities and the power plant through research the content and characteristics of harm