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Meanwhile, iron is a very easy metal to rust after several decades, needless to mention more than a thousand years. Until now, the earthlings have not found an effective method to prevent the rust of iron objects. Although in theory, pure iron does not rust, but pure iron is difficult to make, the price is extremely high. Moreover, some scientists have analyzed the composition of the iron column, discovered that there are a lot of impurities, not pure iron. Redneck they reload eagle 3d hoodie, hawaiian shirt. And in theory, iron columns rust more easily than conventional iron. If it is assumed that the ancient Indians had grasped the technique of smelting stainless steel early and the technique was lost, why not make other stainless iron? Furthermore, there is no record in the iron making of the ancient Indians on this matter.