金属 库存总量 注销仓单 注销占百分比 铜 214,025 88,125 41.18% 铝 2,186,475 809,825 37.04% 锌 383,150 166,775 43.53% 镍 381,720 102,744 26.92% 锡 5,820 1,120 19.24% 铅 189,800 70,300 37.04% 铝合金 13,280 20 0.16%