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三维力 : 19 phrases in 9 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Earth sciences | 1 |
| Electronics | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Sports | 1 |
| Technology | 10 |
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