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| контакт цепи сигнализации | |||
| установление связи по тревоге | |||
| контакт аварийных сигналов (oleg.vigodsky) | |||
| alarm contact: 10 phrases in 7 subjects |
| Electrical engineering | 1 |
| Electronics | 1 |
| Makarov | 1 |
| Measuring instruments | 1 |
| Security systems | 1 |
| Technology | 2 |
| Telecommunications | 3 |