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简谐振 : 20 phrases in 11 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Electronics | 1 |
| Engineering geology | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Hydroelectric power stations | 1 |
| Oil / petroleum | 1 |
| Space | 1 |
| Technology | 9 |
| Telecommunications | 1 |
| Wind Energy | 1 |
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