详情描述:
2B16,2A17,2A20,2A21化学成分2B16,2A17,2A20,2A21力学性能2B16,2A17,2A20,2A21抗拉强度2B16,2A17,2A20,2A21屈服强度2B16,2A17,2A20,2A21硬度2B16,2A17,2A20,2A21伸长率