详情描述：
2A25,2A49,2A50,2B50化学成分2A25,2A49,2A50,2B50，力学性能2A25,2A49,2A50,2B50抗拉强度2A25,2A49,2A50,2B50屈服强度2A25,2A49,2A50,2B50硬度2A25,2A49,2A50,2B50伸长率
