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| опускная секция (подводного тоннеля) | |||
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沉 管 : 24 phrases in 7 subjects |
| Construction | 2 |
| Electronics | 3 |
| General | 8 |
| Medical | 1 |
| Medical appliances | 1 |
| Oilfields | 1 |
| Technology | 8 |
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