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| 叠加时间: 18 phrases in 8 subjects |
| Explosives and Explosive Ordnance Disposal | 1 |
| Geophysics | 5 |
| Heavy equipment vehicles | 1 |
| Mining | 1 |
| Oil / petroleum | 2 |
| Polymers | 4 |
| Space | 1 |
| Technology | 3 |
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