colector : 42 phrases in 14 subjects |
Earth sciences | 2 |
Electric motors | 5 |
Electric traction | 4 |
Electronics | 13 |
Environment | 2 |
Industry | 2 |
Life sciences | 1 |
Mechanic engineering | 4 |
Radio | 1 |
Semiconductors | 3 |
Telegraphy | 1 |
Transport | 2 |
Vacuum tubes | 1 |
Wind Energy | 1 |