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amplificação : 47 phrases in 12 subjects |
| Communications | 8 |
| Earth sciences | 4 |
| Electronics | 19 |
| General | 1 |
| Health care | 1 |
| Industry | 1 |
| Information technology | 5 |
| Life sciences | 1 |
| Mechanic engineering | 2 |
| Medical | 1 |
| Patents | 2 |
| Vacuum tubes | 2 |
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