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回幅 : 15 phrases in 10 subjects |
| Automobiles | 2 |
| Electronics | 1 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Polygraphy | 1 |
| Project management | 1 |
| Securities | 1 |
| Skydiving | 1 |
| Space | 2 |
| Telecommunications | 4 |
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