金属 库存总量 注销仓单 注销占百分比 铜 336,600 79,325 23.57% 铝 3,876,550 1,966,500 50.73% 铅 204,775 98,300 48.0% 锌 495,550 149,450 30.16% 锡 9,655 585 6.06% 镍 433,752 105,786 24.39%