金属 库存总量 注销仓单 注销占百分比 铜 162,100 33,750 20.82% 铝 4,421,150 2,542,475 57.51% 铅 226,550 18,525 8.18% 锌 694,600 123,950 17.84% 锡 10,315 455 4.41% 镍 385,860 88,506 22.94%