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限力器 : 48 phrases in 10 subjects |
| Air defense | 1 |
| Automobiles | 21 |
| Aviation | 6 |
| China | 3 |
| Metallurgy | 1 |
| Refrigeration | 2 |
| Space | 2 |
| Technology | 10 |
| United Nations | 1 |
| United States | 1 |
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