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| 主 齿轮: 153 phrases in 17 subjects |
| Agriculture | 2 |
| Architecture | 1 |
| Automobiles | 34 |
| Aviation | 2 |
| Business | 1 |
| Chemistry | 1 |
| Compressors | 3 |
| Computer numerical control | 2 |
| Electric machinery | 3 |
| General | 1 |
| Mechanic engineering | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Shipbuilding | 1 |
| Space | 3 |
| Technology | 93 |
| Wind Energy | 3 |
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