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عتبة : 29 phrases in 14 subjects |
| Commerce | 1 |
| Construction | 2 |
| Ecology | 1 |
| Economics | 1 |
| Electronics | 2 |
| International Monetary Fund | 3 |
| Lighting other than cinema | 4 |
| Magnetics | 3 |
| Medical | 1 |
| Microsoft | 3 |
| Power electronics | 1 |
| Radio | 2 |
| Statistics | 1 |
| Vacuum tubes | 4 |
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