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| дополнительная зона (A read-only copy of a DNS zone that is transferred from an authoritative DNS server to another DNS server to provide redundancy) | |||
| secondary zone: 11 phrases in 7 subjects |
| Analytical chemistry | 4 |
| Astronautics | 1 |
| Geology | 2 |
| Metallurgy | 1 |
| Military | 1 |
| Technology | 1 |
| Transport | 1 |