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| |||
| return air system (вентиляции); recirculation system | |||
| closed system | |||
| return system | |||
| recirculating system | |||
| рециркуляционная система: 17 phrases in 11 subjects |
| Brewery | 1 |
| Construction | 1 |
| Electronics | 1 |
| Energy industry | 2 |
| Fish farming pisciculture | 1 |
| Makarov | 1 |
| Molikpaq | 1 |
| Oil and gas | 1 |
| Technology | 6 |
| Transport | 1 |
| Weapons of mass destruction | 1 |