Center distance 1.75m, support strength 1.28~1.32MPa; suitable for coal seams with thickness of 8~16m; continuous use for 8 years without major overhaul and lifting to the surface.
Center distance 1.75m, support strength 1.28~1.32MPa; suitable for coal seams with thickness of 8~16m; continuous use for 8 years without major overhaul and lifting to the surface.