金属 库存总量 注销仓单 注销占百分比 铜 318,925 68,850 21,59% 铝 3,617,225 1,628,100 45.01% 锌 470,700 59,425 12.63% 镍 459,198 139,212 30.32% 锡 6,715 1,180 17.57% 铅 174,150 19,525 11.21% 铝合金 15,680 2,020 12.88%