金属 库存总量 注销仓单 注销占百分比 铜 147,275 26,875 18.25% 铝 2,705,550 1,254,650 46.37% 锌 413,250 51,400 12.44% 镍 423,690 118,824 28.05% 锡 4,640 395 8.51% 铅 162,575 47,425 29.17% 铝合金 16,880 20 0.12%