金属 库存总量 注销仓单 注销占百分比 铜 492,350 252,850 51.36% 铝 5,401,975 2,120,425 39.25% 铅 232,825 55,600 23.88% 锌 1,050,750 525,175 50.93% 锡 13,060 2,735 20.94% 镍 231,480 65,388 28.25%