金属 库存总量 注销仓单 注销占百分比 铜 146,475 33,000 22.53% 铝 2,730,475 1,233,175 45.16% 锌 420,775 51,625 12.81% 镍 428,712 124,806 29.11% 锡 4,840 620 12.81% 铅 162,500 47,525 29.25% 铝合金 16,880 20 0.12%