煤炭是铁路循环直达列车的主要运输货物。运煤车辆主要有:装载能力大于或小于100吨的车辆,有底开门或自动倾卸能力的车辆。近年来,减少了车辆自重,增加了车辆的有效装载量,还保持了结构上的统一性,降低了维修费用。此外,还有运输其它货物的新型货车,如便于快装快卸的有棚漏斗车和为运输多种大宗液体货物的罐车。 Coal is the main cargo transported by rail to the train. Coal vehicles are: loading capacity of more than or less than 100 tons of vehicles, the bottom door or automatic dumping capacity vehicles. In recent years, reducing the weight of vehicles, increasing the effective vehicle load, but also to maintain the structural unity and reduce maintenance costs. In addition, there are new wagons for the transport of other goods, such as shed hoppers for fast loading and fast unloading and tankers for the transport of a large variety of bulk liquids.