金属 库存总量 注销仓单 注销占百分比 铜 156,850 32,175 20.51% 铝 2,571,125 1,056,650 41.10% 锌 388,475 23,475 6.04% 镍 404,178 122,388 30.28% 锡 6,615 680 10.28% 铅 180,450 74,550 41.31% 铝合金 14,760 620 4.20%