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spegnimento : 78 phrases in 17 subjects |
| Agriculture | 6 |
| Chemistry | 2 |
| Coal | 9 |
| Earth sciences | 7 |
| Electric traction | 1 |
| Electronics | 8 |
| General | 8 |
| Labor law | 1 |
| Materials science | 20 |
| Mechanic engineering | 3 |
| Metallurgy | 2 |
| Nuclear physics | 5 |
| Power electronics | 2 |
| Semiconductors | 1 |
| Thermal Energy | 1 |
| Transport | 1 |
| Vacuum tubes | 1 |