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regulação : 685 phrases in 43 subjects |
| Agriculture | 44 |
| Automatic control | 3 |
| Chemistry | 14 |
| Communications | 22 |
| Construction | 6 |
| Earth sciences | 20 |
| Economy | 3 |
| Electric motors | 2 |
| Electric traction | 14 |
| Electrical engineering | 2 |
| Electricity generation | 8 |
| Electronics | 133 |
| Energy industry | 2 |
| Environment | 4 |
| Finances | 9 |
| Fish farming pisciculture | 4 |
| Forestry | 1 |
| General | 42 |
| Health care | 2 |
| Industry | 14 |
| Information technology | 21 |
| Insurance | 13 |
| Labor law | 5 |
| Life sciences | 9 |
| Magnetics | 2 |
| Materials science | 1 |
| Mechanic engineering | 113 |
| Medical | 11 |
| Metallurgy | 23 |
| Municipal planning | 3 |
| Natural sciences | 6 |
| Nuclear physics | 9 |
| Patents | 1 |
| Power lines | 1 |
| Power system protection | 1 |
| Procedural law | 2 |
| Radio | 5 |
| Rail transport | 1 |
| Social science | 3 |
| Technology | 28 |
| Telecommunications | 2 |
| Transport | 75 |
| Vacuum tubes | 1 |
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