金属 库存总量 注销仓单 注销占百分比 铜 327,500 112,650 34.40% 铝 3,752,325 1,728,200 46.06% 锌 458,825 69,225 15.09% 镍 465,624 131,952 28.34% 锡 7,630 470 6.16% 铅 158,025 27,875 17.64% 铝合金 20,220 5,340 26.41%