... made from high strength alloy through cold pressing .W-section steel belt is widely used underground coal mine roadway, working surface ... .340>2846.48WD2280323.540>3.46.95Technical characteristic (compared with common steel belt):raw material is high-strength alloyhaving higher rigidity and ... improve strength extension 28-46%.The standard of W-section steel strap:Width:140,160,180,200,220,240,250,270 ...