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| mat | |||
| bottom hull | |||
| 沉垫: 29 phrases in 11 subjects |
| Architecture | 2 |
| Bridge construction | 1 |
| Drilling | 1 |
| Engineering geology | 2 |
| General | 1 |
| Metallurgy | 1 |
| Nautical | 7 |
| Navigation | 1 |
| Oil / petroleum | 7 |
| Technology | 4 |
| Textile industry | 2 |
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