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扫管器 : 23 phrases in 9 subjects |
| Aviation | 1 |
| Chemistry | 1 |
| Earth sciences | 2 |
| Electronics | 4 |
| Metallurgy | 5 |
| Multimedia | 1 |
| Shipbuilding | 1 |
| Space | 2 |
| Technology | 6 |
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