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| 发动机活 塞: 54 phrases in 10 subjects |
| Automobiles | 18 |
| Aviation | 6 |
| Compressors | 1 |
| Construction | 1 |
| General | 1 |
| Metallurgy | 1 |
| Shipbuilding | 1 |
| Skydiving | 2 |
| Space | 3 |
| Technology | 20 |
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