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集电设备 : 31 phrases in 9 subjects |
| Automobiles | 3 |
| Aviation | 7 |
| Electronics | 13 |
| General | 2 |
| Geophysics | 1 |
| Information technology | 1 |
| Project management | 2 |
| Technology | 1 |
| Textile industry | 1 |
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