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| периодическое повторение; ротация | |||
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旋 转，转 作 : 12 phrases in 7 subjects |
| Electronics | 1 |
| General | 4 |
| Medical | 1 |
| Military | 2 |
| Oil / petroleum | 1 |
| Robotics | 1 |
| Technology | 2 |
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