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| audio bug | |||
| monitoring device | |||
| observation device | |||
| listening device (Право международной торговли On-Line) | |||
| устройство для подслушивания: 26 phrases in 6 subjects |
| Information security and data protection | 11 |
| Law | 2 |
| Mass media | 1 |
| Security systems | 9 |
| Slang | 2 |
| Transport | 1 |