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اتصال : 155 phrases in 11 subjects |
| Electric traction | 1 |
| Electronics | 3 |
| Mathematics | 1 |
| Microsoft | 100 |
| Power lines | 2 |
| Power system protection | 2 |
| Radio | 13 |
| Telecommunications | 24 |
| Telegraphy | 2 |
| Telephony | 6 |
| Welding | 1 |
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