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| structure en spirale; structure spiralée | |||
| structure spirale | |||
| structure en hélice; hélicoïdale | |||
| спиральная структура: 8 phrases in 5 subjects |
| Astronomy | 2 |
| Chemistry | 1 |
| High energy physics | 2 |
| Physics | 1 |
| Technology | 2 |
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