长期求购:Long-term purchase:
铅精矿: 铅不小于55%。Lead concentrate (Pb≥55%)黄铜边角料 H65,H60,H62. Brass leftover material H65,H60,H62
黄铜边角料 H65,H60,H62. Brass leftover material H65,H60,H62
粗锌 锌含量大于90%。Crudezinc(Zn>90%)
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