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| канал-спутник (vertical ventilation duct, parallel to the main exhaust duct) | |||
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parallel duct : 1 phrase in 1 subject |
| Technology | 1 |
| |||
| канал-спутник (vertical ventilation duct, parallel to the main exhaust duct) | |||
|
parallel duct : 1 phrase in 1 subject |
| Technology | 1 |