金属 库存总量 注销仓单 注销占百分比 铜 235,400 72,000 30.59% 铝 2,784,975 878,925 31.56% 锌 468,100 95,300 20.36% 镍 443,586 163,446 36.85% 锡 5,380 1,470 27.32% 铅 186,075 88,675 47.66% 铝合金 15,400 20 0.13%