longwall method 中文意思是什麼
longwall method
解釋
長壁法-
Mining horizontal pillars with hydraulic roof propping in longwall caving method
在長壁式崩落法中用液壓支柱護頂回採水平礦柱 -
Longwall and longhole blasting coal mining method for difficult mining seam
難採煤層巷道長壁長孔爆破採煤方法簡介 -
Application of longwall mining method in steeply inclined seam
在急傾斜煤層中巷道長壁採煤法應用
分享友人