金属 库存总量 注销仓单 注销占百分比 铜 312,300 108,025 34.59% 铝 3,671,500 1,641,400 44.71% 锌 442,525 62,600 14.15% 镍 469,080 146,250 31.18% 锡 7,330 815 11.12% 铅 155,775 35,375 22.71% 铝合金 18,440 3,760 20.39%