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截 断面 : 19 phrases in 11 subjects |
| Automobiles | 2 |
| Chemistry | 1 |
| Construction | 4 |
| General | 1 |
| Geology | 2 |
| Hydrography | 1 |
| Mechanic engineering | 1 |
| Nautical | 1 |
| Oilfields | 1 |
| Road works | 1 |
| Technology | 4 |
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