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齿轮数 : 28 phrases in 11 subjects |
| Automobiles | 6 |
| Chemistry | 1 |
| Compressors | 1 |
| Construction | 2 |
| Electric machinery | 1 |
| General | 2 |
| Metallurgy | 1 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Technology | 11 |
| Wind Energy | 1 |
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