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| raceway | |||
| circulation zone | |||
| raceway; raceway zone | |||
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循环区 : 30 phrases in 11 subjects |
| Automobiles | 4 |
| Aviation | 2 |
| Business | 1 |
| Computer numerical control | 1 |
| Electronics | 5 |
| Mathematics | 1 |
| Metallurgy | 7 |
| Multimedia | 1 |
| Nuclear and fusion power | 1 |
| Technology | 6 |
| Telecommunications | 1 |
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