为了增大装载容积,提高车辆运行的稳定性,美国Bethlehem公司制造了一种车底结构为双U形高边煤车。该车载重94.3吨,自重25.4吨,比相同载重吨位的敞车和漏斗车轻5～12%。这种新型敞车,具有很大的装载容积。两转向架之间的车底向下延伸到离轨面330毫米左右,从面降低了重心,减少了普通高边敞车在运行过程中经常出现的侧摆和侧滚问 In order to increase the loading capacity and improve the stability of the vehicle operation, the United States Bethlehem company made a car with a structure of double U-shaped high-side coal car. The truck weighs 94.3 tons and weighs 25.4 tons, 5 to 12 percent lighter than the same deadweight gondola and hopper. This new gondola has a large loading capacity. The two bogies between the bottom of the vehicle extends downward to about 330 mm off the rail surface, reducing the center of gravity from the surface, reducing the common high-side gondola in the operation of the frequent side and side roll