金属 库存总量 注销仓单 注销占百分比 铜 337,175 84,975 25.2% 铝 3,958,625 2,070,125 52.29% 铅 235,750 116,850 49.57% 锌 518,275 174,875 33.74% 锡 9,965 460 4.62% 镍 433,380 106,914 24.67%