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change speed : 83 phrases in 14 subjects |
| Automated equipment | 2 |
| Construction | 2 |
| Drives | 2 |
| Earth sciences | 1 |
| Electronics | 1 |
| Engines | 2 |
| Equestrian sports | 1 |
| Gear train | 2 |
| General | 6 |
| Measuring instruments | 2 |
| Mechanic engineering | 31 |
| Optics branch of physics | 1 |
| Technology | 28 |
| Transport | 2 |