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| 滑环式电动机 | |||
| 环形电动机 | |||
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ring motor : 24 phrases in 10 subjects |
| Automobiles | 2 |
| Aviation | 1 |
| Drilling | 1 |
| Electric machinery | 4 |
| Electronics | 3 |
| General | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Space | 1 |
| Technology | 9 |
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