 |
| densidade: 465 phrases in 41 subjects |
| Agriculture | 22 |
| Animal husbandry | 6 |
| Antennas and waveguides | 4 |
| Brazil | 4 |
| Chemistry | 7 |
| Coal | 6 |
| Communications | 14 |
| Construction | 3 |
| Cultural studies | 1 |
| Earth sciences | 53 |
| Economy | 1 |
| Electric traction | 1 |
| Electricity generation | 1 |
| Electronics | 131 |
| Energy industry | 3 |
| Environment | 5 |
| General | 13 |
| Health care | 3 |
| Industry | 29 |
| Information technology | 16 |
| Law | 1 |
| Life sciences | 17 |
| Lighting other than cinema | 7 |
| Magnetics | 2 |
| Materials science | 8 |
| Mathematics | 11 |
| Mechanic engineering | 2 |
| Medical | 8 |
| Metallurgy | 4 |
| Metrology | 2 |
| Natural sciences | 4 |
| Physical sciences | 15 |
| Physics | 6 |
| Radio | 5 |
| Scientific | 3 |
| Statistics | 29 |
| Technology | 6 |
| Telegraphy | 1 |
| Telephony | 1 |
| Transport | 8 |
| Vacuum tubes | 2 |