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| главное звено (also critical, crucial, essential, important, significant, vital * Social workers provide a vital link between hospital and community. OCD Alexander Demidov) | |||
| основное звено (e.g., in the chain Alexander Demidov) | |||
| key link: 5 phrases in 4 subjects |
| Information security and data protection | 2 |
| Security systems | 1 |
| Technology | 1 |
| Telecommunications | 1 |