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负 集 : 31 phrases in 11 subjects |
| Business | 2 |
| Compressors | 1 |
| Electronics | 5 |
| Exhibitions | 1 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Oil / petroleum | 2 |
| Plastics | 1 |
| Project management | 2 |
| Securities | 2 |
| Technology | 12 |
| Telecommunications | 1 |
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