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| safety, health and environment (igisheva); environment, health and safety (igisheva) | |||
| health, safety and environment (Alexander Demidov) | |||
| промышленная и экологическая безопасность: 5 do fraz, 3 tematyki |
| Bezpieczeństwo i higiena pracy | 2 |
| Olej i gaz | 1 |
| Pospolicie | 2 |