短语词组短语copper -nickel concentrate 铜镍精矿copper leaded nickel bronze 铜铅镍青铜copper and nickel wastewater 铜镍废水copper and nickel sulfide 铜镍硫化物leaded copper -nickel 铅锌白铜sulphide copper -nickel 硫化铜镍Copper -nickel wire 铜镍丝 返回 copper nickel