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供应C11600 C11700 C12000 C12100 C12200 C12300 C12500铜合金的化学成分C11600 C11700 C12000 C12100 C12200 C12300 C12500铜合金的力学性能C11600 C11700 C12000 C12100 C12200 C12300 C12500铜合金的抗拉强度C11600 C11700 C12000 C12100 C12200 C12300 C12500铜合金的屈服强度C11600 C11700 C12000 C12100 C12200 C12300 C12500铜合金的硬度C11600 C11700 C12000 C12100 C12200 C12300 C12500铜合金的伸长率