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| Occupational hazards (3) |
| Occupational security (3) |
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| Seguridad ocupacional (3) |
| TECHNOLOGY (3) |
| Fires (2) |
| Incendios (2) |
| Señalización (2) |
| Signaling (2) |
| Administrative control (1) |
| Occupational hazards (3) |
| Occupational security (3) |
| Riesgos laborales (3) |
| Seguridad ocupacional (3) |
| TECHNOLOGY (3) |
| Fires (2) |
| Incendios (2) |
| Señalización (2) |
| Signaling (2) |
| Administrative control (1) |