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confidential (Irina Verbitskaya) | |||
sensitive (материалы закрытого характера – sensitive information Alex_Odeychuk) | |||
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insular nature (bookworm) | |||
opaqueness |
закрытого характера: 8 phrases in 5 subjects |
Chess | 1 |
General | 2 |
Intelligence and security services | 2 |
Religion | 1 |
Security systems | 2 |