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加工 试验 : 14 phrases in 9 subjects |
| Automobiles | 1 |
| Aviation | 3 |
| Chemistry | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Metallurgy | 1 |
| Pest control | 3 |
| Polymers | 1 |
| Space | 1 |
| Technology | 2 |
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