change-speed: 60 phrases in 13 subjects |
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 | 7 |
Transport | 2 |