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| секретная операция | |||
| тайная операция (in a covert operation, the identity of the sponsor is concealed. Val_Ships) | |||
| скрытая операция | |||
| English thesaurus | |||
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| Also called clandestine operation | |||
| An operation that is so planned and executed as to conceal the identity of or permit plausible denial by the sponsor (JP 3-05) see also clandestine operation, overt operation | |||
| covert operation: 3 phrases in 2 subjects |
| Intelligence and security services | 1 |
| Security systems | 2 |