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|
segnale : 1643 phrases in 46 subjects |
| Agriculture | 2 |
| Antennas and waveguides | 5 |
| Automatic control | 11 |
| Brazil | 7 |
| Chemistry | 2 |
| Communications | 516 |
| Cultural studies | 2 |
| Earth sciences | 10 |
| Electrical engineering | 1 |
| Electronics | 504 |
| Environment | 3 |
| Finances | 3 |
| General | 12 |
| Health care | 1 |
| Industry | 1 |
| Information technology | 161 |
| Labor law | 6 |
| Law | 7 |
| Life sciences | 3 |
| Lighting other than cinema | 5 |
| Magnetics | 3 |
| Materials science | 4 |
| Mechanic engineering | 8 |
| Medical | 17 |
| Microsoft | 5 |
| Natural sciences | 3 |
| Patents | 1 |
| Pharmacy and pharmacology | 1 |
| Piezoelectric crystals | 5 |
| Power electronics | 2 |
| Power lines | 25 |
| Power system protection | 7 |
| Radio | 59 |
| Radiobiology | 1 |
| Rail transport | 77 |
| Scientific | 1 |
| Semiconductors | 1 |
| Sound recording | 5 |
| Statistics | 10 |
| Technology | 10 |
| Telecommunications | 37 |
| Telegraphy | 31 |
| Telephony | 2 |
| Transport | 62 |
| Vacuum tubes | 1 |
| Video recording | 3 |
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