详情描述：
2A12,2A13,2A14,2A16化学成分2A12,2A13,2A14,2A16力学性能2A12,2A13,2A14,2A16抗拉强度2A12,2A13,2A14,2A16屈服强度2A12,2A13,2A14,2A16硬度2A12,2A13,2A14,2A16伸长率
