金属 库存总量 注销仓单 注销占百分比 铜 346,150 88,650 25.61% 铝 2,099,475 838,575 39.94% 锌 456,275 35,400 7.76% 镍 362,478 115,356 31.82% 锡 3,250 1,870 57.54% 铅 189,800 29,825 15.71% 铝合金 13,680 20 0.15%