Center distance 1.75m, support strength 1.23~1.35MPa; suitable for coal seams with thickness of 3.4~5.3m; the first to achieve the maximum working resistance of 15000kN.
Center distance 1.75m, support strength 1.23~1.35MPa; suitable for coal seams with thickness of 3.4~5.3m; the first to achieve the maximum working resistance of 15000kN.