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混凝土台 : 48 phrases in 10 subjects |
| Bridge construction | 6 |
| Communications | 1 |
| Consulting | 3 |
| Drilling | 1 |
| Engineering geology | 1 |
| Navigation | 2 |
| Oil / petroleum | 3 |
| Rail transport | 1 |
| Space | 1 |
| Technology | 29 |
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