 |
| riflettore: 180 phrases in 20 subjects |
| Antennas and waveguides | 16 |
| Astronomy | 5 |
| Communications | 29 |
| Construction | 1 |
| Cultural studies | 1 |
| Earth sciences | 6 |
| Electronics | 69 |
| Energy industry | 12 |
| General | 13 |
| Hobbies and pastimes | 1 |
| Industry | 2 |
| Information technology | 2 |
| Life sciences | 10 |
| Lighting other than cinema | 2 |
| Mechanic engineering | 3 |
| Medical | 4 |
| Nuclear and fusion power | 1 |
| Nuclear physics | 1 |
| Patents | 1 |
| Thermal Energy | 1 |