| SAU.Developer. | Personnel involved in the design phase (hardware/software designer, programmer, test engineer). |
| SAU.ManufPers. | Personnel involved in the manufacturing processes (components manufacturing, assembly, security data insertion, storage, distribution, repair). |
| SAU.ServicePers. | Personnel involved in sensor or sensors system maintenance (storage, installation, inspection, calibration, repair). |
| Refinement:Personnel can work both in the mine underground and in authorized workshops on the mine surface. | |
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