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| regular intervals | |||
| fixed-pitch spacing | |||
| fixed interval; fixed spacing | |||
| 固定间隔: 7 phrases in 7 subjects |
| Air defense | 1 |
| Electronics | 1 |
| Geophysics | 1 |
| Information technology | 1 |
| Plastics | 1 |
| Space | 1 |
| Technology | 1 |
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