金属 库存总量 注销仓单 注销占百分比 铜 255,050 53,250 20.88% 铝 2,953,800 1,320,275 44.70% 锌 552,425 96,850 17.53% 镍 415,452 176,448 42.47% 锡 5,295 485 8.78% 铅 133,900 29,300 21.88% 铝合金 12,440 40 0.32%