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perfuração : 133 phrases in 22 subjects |
| Cables and cable production | 3 |
| Coal | 29 |
| Communications | 9 |
| Construction | 1 |
| Earth sciences | 4 |
| Economy | 2 |
| Electrical engineering | 3 |
| Electronics | 15 |
| Energy industry | 1 |
| Environment | 4 |
| General | 3 |
| Industry | 6 |
| Information technology | 15 |
| Life sciences | 4 |
| Materials science | 2 |
| Mechanic engineering | 7 |
| Medical | 1 |
| Metallurgy | 7 |
| Mining | 1 |
| Oil / petroleum | 8 |
| Semiconductors | 5 |
| Transport | 3 |
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