车轴钢 Axle steel | LZ50 EA1N AARM-101F | 230*230 250*250 280*280 | TB/T 2945 EN 13261 AAR M-101 技术协议 Technical protocol | 用于制作铁路货车、铁路客车、地铁、 轻轨等轨道交通车辆的车轴。 Used for making axles of railway passengerand freight cars,subways,light rail and otherrail transit vehicles. |