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contacto : 940 phrases in 50 subjects |
| Agriculture | 11 |
| Antennas and waveguides | 2 |
| Business | 1 |
| Chemistry | 53 |
| Commerce | 2 |
| Communications | 15 |
| Cultural studies | 2 |
| Earth sciences | 49 |
| Economy | 4 |
| Electric machinery | 11 |
| Electric traction | 23 |
| Electronics | 231 |
| Environment | 7 |
| Finances | 11 |
| Food industry | 3 |
| General | 142 |
| Health care | 15 |
| Human rights activism | 2 |
| Immigration and citizenship | 2 |
| Industry | 26 |
| Information technology | 28 |
| Insurance | 4 |
| Isolation | 3 |
| Labor law | 3 |
| Law | 5 |
| Life sciences | 3 |
| Lighting other than cinema | 1 |
| Materials science | 4 |
| Mathematics | 2 |
| Mechanic engineering | 52 |
| Medical | 41 |
| Metallurgy | 19 |
| Microsoft | 43 |
| Municipal planning | 1 |
| Natural sciences | 8 |
| Nuclear physics | 1 |
| Patents | 3 |
| Pharmacy and pharmacology | 3 |
| Politics | 3 |
| Power system protection | 37 |
| Printed circuit boards | 1 |
| Radiology | 1 |
| Rail transport | 3 |
| Risk Management | 1 |
| Social science | 1 |
| Statistics | 3 |
| Technology | 9 |
| Telecommunications | 1 |
| Transport | 43 |
| Welding | 1 |
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