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底阻 : 24 phrases in 12 subjects |
| Aviation | 1 |
| Drilling | 1 |
| Electronics | 2 |
| Geophysics | 3 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Rail transport | 1 |
| Space | 2 |
| Technology | 9 |
| Telecommunications | 1 |
| Wind Energy | 1 |
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