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.

youdao

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.

youdao