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perturbations : 302 phrases in 43 subjects |
| Agriculture | 5 |
| Astronautics | 1 |
| Astronomy | 17 |
| Automated equipment | 36 |
| Automatic control | 3 |
| Coal | 1 |
| Communications | 23 |
| Computer numerical control | 5 |
| Computers | 12 |
| Construction | 2 |
| Earth sciences | 11 |
| Economics | 10 |
| Electricity generation | 2 |
| Electronics | 22 |
| Energy industry | 3 |
| Environment | 12 |
| Finances | 8 |
| Forestry | 1 |
| General | 18 |
| Health care | 10 |
| High energy physics | 5 |
| Hobbies and pastimes | 1 |
| Information technology | 2 |
| International Monetary Fund | 4 |
| International trade | 1 |
| Labor law | 1 |
| Law | 10 |
| Life sciences | 13 |
| Magnetics | 13 |
| Materials science | 1 |
| Mathematics | 5 |
| Measuring instruments | 2 |
| Mechanic engineering | 1 |
| Medical | 8 |
| Medical appliances | 2 |
| Metallurgy | 4 |
| Natural sciences | 5 |
| Physical sciences | 1 |
| Radio | 1 |
| Statistics | 8 |
| Technology | 4 |
| Telecommunications | 5 |
| Transport | 3 |