金属 库存总量 注销仓单 注销占百分比 铜 379,175 77,900 20.54% 铝 2,128,750 862,800 40.53% 锌 439,975 27,200 6.18% 镍 362,448 112,488 31.04% 锡 3,460 1,835 53.03% 铅 190,700 65,900 34.56% 铝合金 11,680 20 0.15%