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| оперативная деятельность | |||
| оперативная работа (The allegations that secret services use these methods in operational work for political ends are false.) | |||
негласные оперативные мероприятия (Operational work in Poland can only be carried out on request from the prosecutor general and after a court order.  theguardian.com Alex_Odeychuk) | |||
| оперативная работа (Yeldar Azanbayev) | |||
| operational work: 4 phrases in 3 subjects |
| Armored vehicles | 2 |
| Production | 1 |
| Security systems | 1 |