vitrain

In vitrain bands the density and fractal dimension of fractures related to the thickness and lithotyp...

煤岩结构研究在预测煤层渗透性方面有重要意义。

The paper had a coal water mixture test with vitrain coal, bright coal and dull coal from Ningtiaota coal in Shenfu mining area.

选择神府矿区柠条塔煤煤、亮煤暗煤进水煤浆试验。