【题目】帮忙翻译这篇文章 不要用翻译软件Copperstockpilesheldinduty-freewarehousesinChi na,thetopuser,maybere-exportedaftersurgingtoas muchas 350,000 tonsfromalmostnoneatthestart oftheyear,accordingtoXi'anMaikeMetalInternatio