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| nature-man-made (natural-technological events (i.e., industrial accidents triggered by natural phenomena or na-techs) MichaelBurov); natural-technological (natural-technological events (i.e., industrial accidents triggered by natural phenomena or na-techs) MichaelBurov) | |||
| природно-технологический: 13 a las frases, 5 temas |
| Ecología | 2 |
| General | 1 |
| Industria energetica | 3 |
| Perforación | 1 |
| Sistemas de seguridad | 6 |