 |
| |||
| durée de vie d'une lampe | |||
| duração de vida: 19 phrases in 12 subjects |
| Accumulators | 1 |
| Economy | 3 |
| Electric machinery | 2 |
| Electronics | 1 |
| Isolation | 2 |
| Lighting other than cinema | 3 |
| Medical | 2 |
| Metallurgy | 1 |
| Natural sciences | 1 |
| Reliability | 1 |
| Semiconductors | 1 |
| Statistics | 1 |