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| intrinsically safe circuit (Alexander Demidov) | |||
| intrinsically safe circuit (ИБЦ, ISC MichaelBurov) | |||
| spark-safe circuit | |||
| искробезопасная цепь: 7 phrases in 6 subjects |
| Electrical engineering | 1 |
| Electricity | 2 |
| General | 1 |
| Mining | 1 |
| Technology | 1 |
| Weapons of mass destruction | 1 |