金属 库存总量 注销仓单 注销占百分比 铜 447,650 276,225 67.71% 铝 5,357,750 2,109,025 39.36% 铅 235,425 53,350 22.66% 锌 991,600 564,850 56.96% 锡 11,445 3,670 32.07% 镍 244,938 96,360 39.34%