金属 库存总量 注销仓单 注销占百分比 铜 219,425 93,225 42.49% 铝 2,191,450 783,400 35.75% 锌 385,925 169,550 43.93% 镍 384,000 105,000 27.34% 锡 5,820 1,110 19.07% 铅 189,800 70,300 37.04% 铝合金 13,280 20 0.16%