金属 库存总量 注销仓单 注销占百分比 铜 371,475 62,625 16.86% 铝 2,125,850 871,175 40.98% 锌 441,475 28,700 6.50% 镍 361,860 111,312 30.76% 锡 3,650 1,945 53.29% 铅 191,250 66,150 34.59% 铝合金 11,680 20 0.15%