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| gearhead | |||
| 全齿 轮: 25 phrases in 9 subjects |
| Automobiles | 2 |
| Aviation | 1 |
| Construction | 1 |
| Electric machinery | 2 |
| Electronics | 1 |
| General | 2 |
| Oil / petroleum | 1 |
| Technology | 13 |
| Wind Energy | 2 |
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