Deeply Inclined Coal Seams  大倾角煤层

Inclined Coal Seam  倾斜煤层

sharply inclined coal seam  急倾斜

steep-inclined coal seam  急倾斜煤层

Steeply Inclined Coal Seam  急倾斜煤层; 大倾角煤层; 急－倾斜厚煤层

Deeply Inclined  大倾角煤层; 急倾斜

deeply inclined angle seam  大倾角

coal seam with high inclined angle  大倾角煤层

Deep Inclined Seam  大倾角煤层; 急倾斜煤层

deep inclined seam with potential outburst  大倾角松软突出煤层

flately inclined seam  缓倾斜煤层

fully mechanized coal mining face in steep inclined seam  急倾斜综采

high inclined angle coal seam  大倾角煤层

INCLINED COAL PILLAR  倾向煤柱

Inclined Coal Seams  倾斜煤层

Inclined Seam  斜矿层; 倾斜煤层; 倾斜层

Steep Inclined Seam  急斜煤层; 急倾斜煤层

steep-inclined coal  急倾斜煤层

steep-inclined super-thick coal seam  急倾斜特厚煤层