金属 库存总量 注销仓单 注销占百分比 铜 314,025 74,525 23.73% 铝 3,652,125 1,658,750 44.42% 锌 458,875 67,150 14.63% 镍 465,264 144,048 30.96% 锡 7,375 780 10.71% 铅 187,800 34,125 18.17% 铝合金 17,300 3,560 20.58%