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Inventories | 12 Months Ended
--- | ---
Dec. 31, 2021
Inventories |
| Note | 17 | Inventories
Schedule of inventories asset
|  | 12.31.21 |  | 12.31.20
Supplies and spare-parts |  | 3,441 |  | 2,772
Advance to suppliers |  | - |  | 51
Total inventories |  | 3,441 |  | 2,823

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