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| filter system (ssn) | |||
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| filter systems (ssn) | |||
| фильтровая система: 20 phrases in 11 subjects |
| Automated equipment | 2 |
| Aviation | 2 |
| Cinematography | 1 |
| Energy industry | 4 |
| Internet | 1 |
| Makarov | 1 |
| Mass media | 4 |
| Programming | 1 |
| Technology | 2 |
| Telecommunications | 1 |
| Weapons of mass destruction | 1 |