Center distance 1.75m, support strength 1.32~1.36MPa; suitable for coal seams with thickness of 3.4~5.3m; durability performance test 40000 cycles, continuous use for 5 years without major overhaul and lifting to the surface.
Center distance 1.75m, support strength 1.32~1.36MPa; suitable for coal seams with thickness of 3.4~5.3m; durability performance test 40000 cycles, continuous use for 5 years without major overhaul and lifting to the surface.