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垫模模 : 59 phrases in 10 subjects |
| Architecture | 1 |
| Automobiles | 9 |
| Aviation | 1 |
| Chemistry | 1 |
| General | 2 |
| Metallurgy | 7 |
| Nautical | 1 |
| Plastics | 12 |
| Shipbuilding | 2 |
| Technology | 23 |
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