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The chinese firm borrows dollars to buy copper , which is then stored in bonded warehouses .

中国公司借美元来买铜，然后将其存在保税仓库中。

The market is providing traders who hold metal in chinese bonded warehouses with a powerful incentive to export .

当前市场为在中国保税区持有铜的交易商提供了强大的出口动力。

Recent photos taken by investment-bank analysts show where those imports end up . The copper sits in bonded warehouses , piled to the rafters , blocking doorways and occupying parking lots .

投行分析师近期拍摄的照片显示，这些进口铜最终被堆在了保税仓库中，高及屋椽，不但堵住了门口还占据了停车位。

With financing for such trades relatively plentiful , traders say that only a fraction of the metal in bonded warehouses is available for sale .

由于存在大量这种融资交易，交易商认为保税区中只有小部分铜可以用来销售。

Moreover , metal in chinese bonded warehouses is trading at a premium of about $ 50 to the lme , according to traders .

此外，交易商表示，中国保税区的铜的交易价比lme高出约50美元。