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| 灾害预防 | |||
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prevention of disasters : 6 do fraz, 5 tematyki |
| Biznes | 1 |
| Ekologia | 1 |
| Kolejnictwo | 1 |
| Nauka pustynna | 1 |
| Technika i technologia | 2 |
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| |||
| 灾害预防 | |||
|
prevention of disasters : 6 do fraz, 5 tematyki |
| Biznes | 1 |
| Ekologia | 1 |
| Kolejnictwo | 1 |
| Nauka pustynna | 1 |
| Technika i technologia | 2 |