Center distance 2.05m, support strength 1.52~1.58MPa. Suitable for coal seams with thickness of 10~20m. The first development and application of Q1150 ultra-high strength steel plate and reasonable matching welding materials.
Center distance 2.05m, support strength 1.52~1.58MPa. Suitable for coal seams with thickness of 10~20m. The first development and application of Q1150 ultra-high strength steel plate and reasonable matching welding materials.