铁路敞车中梁(帽儿钢)是铁路运输货车的主要关键构件，原本由牌号为09v的低强度钢制造。
Railway truck, s beam is the main essential component of railway transportation vehicle, it was manufactured with low intensity steel in type 09v.
除了计算工业产出，工厂就业率和百货商场销售额外，他们还计算铁路运输的货车数量。
Along with manufacturing output, factory employment and department-store sales, they counted the number of freight wagons transported by rail.
C70货车是中国的主型铁路货车，其轮—轴失效关系到铁路运输安全。
C70 type freight car is a main kind of operational freight car in China.
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