金属 库存总量 注销仓单 注销占百分比 铜 343,875 221,200 64.33% 铝 5,437,425 2,362,625 43.45% 铅 213,000 29,150 13.69% 锌 905,575 384,775 42.49% 锡 9,660 4,095 42.39% 镍 261,906 100,248 38.28%