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基础桩 : 66 phrases in 9 subjects |
| Bridge construction | 8 |
| Drilling | 1 |
| Engineering geology | 11 |
| Metallurgy | 1 |
| Nautical | 1 |
| Oil / petroleum | 2 |
| Rail transport | 3 |
| Technology | 38 |
| Wind Energy | 1 |
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