金属 库存总量 注销仓单 注销占百分比 铜 317,475 77,275 24.34% 铝 3,658,525 1,641,500 44.87% 锌 449,250 69,225 15.41% 镍 465,690 147,564 31.68% 锡 7,395 785 10.62% 铅 185,325 36,550 19.62% 铝合金 17,560 3,820 21.75%