thin steeply inclined seam
Deeply Inclined Coal Seam
sharply inclined coal seam
steep-inclined coal seam
Steeply inclined Longwell top-coal caving face
Steeply inclined ore body
steeply inclined reversed fault
steeply inclined separator
steeply inclined thick body
Steeply-Inclined Thick Coal
Steeply-inclined Thin Orebody
coal seam with high inclined angle
deep inclined seam with potential outburst
Deeply Inclined Coal Seams