| Purchase 737 | Spare parts | 27-05-2021 – 26-06-2021 | View purchase |
| Purchase 739 | sporting goods | 31-05-2021 – 15-06-2021 | View purchase |
| Purchase 736 | Services | 27-05-2021 – 10-06-2021 | View purchase |
| Purchase 735 | Equipment and vehicles | 25-05-2021 – 05-06-2021 | View purchase |
| Purchase 734 | Fuels and lubricants | 18-05-2021 – 01-06-2021 | View purchase |
| Purchase 738 | Spare parts | 28-05-2021 – 23-05-2021 | View purchase |
| Purchase 733 | Devices, instrumentation automation | 07-05-2021 – 17-05-2021 | View purchase |
| Purchase 732 | Devices, instrumentation automation | 07-05-2021 – 17-05-2021 | View purchase |
| Purchase 731 | Devices, instrumentation automation | 07-05-2021 – 17-05-2021 | View purchase |
| Purchase 714 | Chemical materials | 06-04-2021 – 10-05-2021 | View purchase |
| Purchase 729 | Devices, instrumentation automation | 28-04-2021 – 08-05-2021 | View purchase |
| Purchase 728 | Devices, instrumentation automation | 28-04-2021 – 08-05-2021 | View purchase |
| Purchase 727 | Devices, instrumentation automation | 28-04-2021 – 08-05-2021 | View purchase |
| Purchase 726 | Devices, instrumentation automation | 28-04-2021 – 08-05-2021 | View purchase |
| Purchase 725 | Devices, instrumentation automation | 28-04-2021 – 08-05-2021 | View purchase |
| Purchase 724 | Devices, instrumentation automation | 28-04-2021 – 08-05-2021 | View purchase |
| Purchase 730 | Devices, instrumentation automation | 28-04-2021 – 08-05-2021 | View purchase |
| Purchase 722 | Equipment and vehicles | 23-04-2021 – 07-05-2021 | View purchase |
| Purchase 721 | Equipment and vehicles | 22-04-2021 – 05-05-2021 | View purchase |
| Purchase 719 | Mechanical parts | 21-04-2021 – 05-05-2021 | View purchase |