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多 振动 : 35 phrases in 8 subjects |
| Automobiles | 1 |
| Aviation | 2 |
| Explosives and Explosive Ordnance Disposal | 2 |
| General | 2 |
| Geophysics | 2 |
| Physics | 1 |
| Space | 6 |
| Technology | 19 |
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