 |
| regulação: 627 phrases in 43 subjects |
| Agriculture | 43 |
| Automatic control | 2 |
| Chemistry | 14 |
| Commerce | 1 |
| Communications | 23 |
| Construction | 5 |
| Earth sciences | 27 |
| Economy | 3 |
| Electric motors | 2 |
| Electric traction | 10 |
| Electrical engineering | 2 |
| Electricity generation | 5 |
| Electronics | 105 |
| Energy industry | 3 |
| Environment | 6 |
| Finances | 9 |
| Fish farming pisciculture | 4 |
| Forestry | 1 |
| General | 38 |
| Health care | 3 |
| Industry | 11 |
| Information technology | 27 |
| Insurance | 15 |
| Labor law | 3 |
| Life sciences | 6 |
| Magnetics | 2 |
| Mechanic engineering | 92 |
| Medical | 12 |
| Metallurgy | 17 |
| Municipal planning | 4 |
| Natural sciences | 8 |
| Nuclear physics | 7 |
| Patents | 1 |
| Power lines | 2 |
| Power system protection | 1 |
| Procedural law | 2 |
| Radio | 3 |
| Rail transport | 1 |
| Social science | 5 |
| Technology | 33 |
| Telecommunications | 2 |
| Transport | 65 |
| Vacuum tubes | 2 |