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| перпендикулярные плоскости | |||
| perpendicular planes: 13 phrases in 7 subjects |
| Astronautics | 1 |
| Automated equipment | 3 |
| Construction | 2 |
| Electrical engineering | 1 |
| Makarov | 2 |
| Oil / petroleum | 1 |
| Technology | 3 |
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