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| канал для подачи тепла; обогревающий канал | |||
| heating passage: 8 phrases in 7 subjects |
| Automobiles | 1 |
| Chemistry | 1 |
| Construction | 1 |
| Energy industry | 1 |
| Meteorology | 1 |
| Technology | 2 |
| Transport | 1 |
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