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 |