 |
| regulação: 543 phrases in 40 subjects |
| Agriculture | 37 |
| Automatic control | 1 |
| Chemistry | 16 |
| Communications | 16 |
| Construction | 2 |
| Earth sciences | 14 |
| Economy | 3 |
| Electric motors | 2 |
| Electric traction | 14 |
| Electrical engineering | 2 |
| Electricity generation | 4 |
| Electronics | 113 |
| Energy industry | 4 |
| Environment | 4 |
| Finances | 4 |
| Fish farming pisciculture | 2 |
| General | 33 |
| Health care | 1 |
| Industry | 14 |
| Information technology | 23 |
| Insurance | 12 |
| Labor law | 3 |
| Life sciences | 5 |
| Magnetics | 2 |
| Mechanic engineering | 78 |
| Medical | 10 |
| Metallurgy | 12 |
| Natural sciences | 6 |
| Nuclear physics | 5 |
| Patents | 1 |
| Power lines | 1 |
| Power system protection | 2 |
| Procedural law | 2 |
| Radio | 3 |
| Rail transport | 1 |
| Social science | 2 |
| Technology | 21 |
| Telecommunications | 2 |
| Transport | 64 |
| Vacuum tubes | 2 |