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INVENTORIES, NET (Tables) | 12 Months Ended
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Dec. 31, 2017
Subclassifications of assets, liabilities and equities [abstract] |
Schedule of Inventory |
| As of December 31,
| 2017 |  | 2016
Raw materials, materials and spare parts | 616,870 |  |  | 401,481 |
Goods in process | 1,251,779 |  |  | 811,378 |
Finished goods | 423,372 |  |  | 281,770 |
Goods in transit | 295,106 |  |  | 186,673 |
Obsolescence allowance (Note 19) | (36,197 | ) |  | (33,433 | )
Inventories, net | 2,550,930 |  |  | 1,647,869 |

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