 |
| filament: 145 phrases in 19 subjects |
| Agriculture | 2 |
| Chemistry | 4 |
| Earth sciences | 6 |
| Electronics | 29 |
| Energy industry | 1 |
| Fish farming pisciculture | 1 |
| General | 6 |
| Industry | 61 |
| Life sciences | 1 |
| Lighting other than cinema | 7 |
| Materials science | 1 |
| Medical | 6 |
| Metallurgy | 1 |
| Natural sciences | 2 |
| Patents | 2 |
| Superconductivity | 2 |
| Technology | 4 |
| Transport | 6 |
| Vacuum tubes | 3 |