金属 库存总量 注销仓单 注销占百分比 铜 314,400 73,400 23.34% 铝 3,644,350 1,653,875 44.38% 锌 469,550 65,100 13.86% 镍 464,556 145,962 31.42% 锡 7,345 785 10.68% 铅 185,225 30,800 16.62% 铝合金 17,180 3,520 20.49%