... -30tons 3. wheel gauge: 600,etc Mine car wheel sets factory.1. material: cast steel ... or cast iron 2. constitute: two wheels, one axle, four bearings, and other parts.3. loading capacity ... , 350mm, 400mm, 450mm7.the material of the axle: 45# steel, or Q2358.the quantity of ... car, bucket dumping mine car, fixed mine car, flat bed mine car, small volume mine car, small loading capacity mine car, mining car ...